Course topics

\n \n \n \n energy,\n \n \n \n \n \n water,\n \n \n \n \n \n light,\n \n \n \n \n \n photosynthesis,\n \n \n \n \n \n temperature,\n \n \n \n \n \n food,\n \n \n \n \n \n oxygen,\n \n \n \n \n \n carbon dioxide,\n \n \n \n \n \n sound,\n \n \n \n \n \n density,\n \n \n \n \n \n gases,\n \n \n \n \n \n experiment,\n \n \n \n \n \n chemical energy,\n \n \n \n \n \n glucose,\n \n \n \n \n \n substances,\n \n \n \n \n \n volume,\n \n \n \n \n \n equation,\n \n \n \n \n \n growth,\n \n \n \n \n \n absorption,\n \n \n \n \n \n earth,\n \n \n \n \n \n liquids,\n \n \n \n \n \n solids,\n \n \n \n \n \n air,\n \n \n \n \n \n acid,\n \n \n \n \n \n light energy,\n \n \n \n \n \n sperm,\n \n \n \n \n \n cells,\n \n \n \n \n \n respiration,\n \n \n \n \n \n movement,\n \n \n \n \n \n electricity,\n \n \n \n \n \n plants,\n \n \n \n \n \n heat,\n \n \n \n \n \n heat energy,\n \n \n \n \n \n soil,\n \n \n \n \n \n elements,\n \n \n \n \n \n reflection,\n \n \n \n \n \n properties,\n \n \n \n \n \n electrical,\n \n \n \n \n \n Sun,\n \n \n \n \n \n metal,\n \n \n \n \n \n compound,\n \n \n \n \n \n human,\n \n \n \n \n \n fetus,\n \n \n \n \n \n respire,\n \n \n \n \n \n plant growth,\n \n \n \n \n \n particles,\n \n \n \n \n \n circuit diagram,\n \n \n \n \n \n pollution,\n \n \n \n \n \n environment,\n \n \n \n \n \n roots,\n \n \n \n \n \n weight,\n \n \n \n \n \n substance,\n \n \n \n \n \n reaction,\n \n \n \n \n \n mass,\n \n \n \n \n \n electrical energy,\n \n \n \n \n \n melting,\n \n \n \n \n \n minerals,\n \n \n \n \n \n freezing,\n \n \n \n \n \n freeze,\n \n \n \n \n \n changes,\n \n \n \n \n \n health,\n \n \n \n \n \n force,\n \n \n \n \n \n compounds,\n \n \n \n \n \n chemical reactions,\n \n \n \n \n \n surface,\n \n \n \n \n \n metals,\n \n \n \n \n \n biomass,\n \n \n \n \n \n oil,\n \n \n \n \n \n coal,\n \n \n \n \n \n energy\xc2\xa0transfer,\n \n \n \n \n \n batteries,\n \n \n \n \n \n iron,\n \n \n \n \n \n testing,\n \n \n \n \n \n ecosystem,\n \n \n \n \n \n prey,\n \n \n \n \n \n fertilization,\n \n \n \n \n \n uterus,\n \n \n \n \n \n digestion,\n \n \n \n \n \n hormones,\n \n \n \n \n \n brain,\n \n \n \n \n \n sex cells,\n \n \n \n \n \n ova,\n \n \n \n \n \n lungs,\n \n \n \n \n \n equations,\n \n \n \n \n \n distance,\n \n \n \n \n \n speed,\n \n \n \n \n \n conversion,\n \n \n \n \n \n matter,\n \n \n \n \n \n compression,\n \n \n \n \n \n circuit,\n \n \n \n \n \n resistance,\n \n \n \n \n \n current,\n \n \n \n \n \n fuel,\n \n \n \n \n \n acid rain,\n \n \n \n \n \n combustion,\n \n \n \n \n \n fossil fuels,\n \n \n \n \n \n renewable,\n \n \n \n \n \n nonrenewable,\n \n \n \n \n \n non-renewable,\n \n \n \n \n \n acid precipitation,\n \n \n \n \n \n carbohydrates,\n \n \n \n \n \n products,\n \n \n \n \n \n balance,\n \n \n \n \n \n gravity,\n \n \n \n \n \n diet,\n \n \n \n \n \n energy values,\n \n \n \n \n \n life processes,\n \n \n \n \n \n reactions,\n \n \n \n \n \n chlorophyll,\n \n \n \n \n \n structure,\n \n \n \n \n \n sound energy,\n \n \n \n \n \n solar energy,\n \n \n \n \n \n pressure,\n \n \n \n \n \n animals,\n \n \n \n \n \n body,\n \n \n \n \n \n orbit,\n \n \n \n \n \n planets,\n \n \n \n \n \n diffusion,\n \n \n \n \n \n boiling,\n \n \n \n \n \n condensing,\n \n \n \n \n \n melt,\n \n \n \n \n \n condense,\n \n \n \n \n \n physical,\n \n \n \n \n \n transfer,\n \n \n \n \n \n insulation,\n \n \n \n \n \n electric current,\n \n \n \n \n \n conduction,\n \n \n \n \n \n kinetic energy,\n \n \n \n \n \n rotation,\n \n \n \n \n \n formula,\n \n \n \n \n \n atoms,\n \n \n \n \n \n genes,\n \n \n \n \n \n characteristics,\n \n \n \n \n \n inherit,\n \n \n \n \n \n angle,\n \n \n \n \n \n dense,\n \n \n \n \n \n magnets,\n \n \n \n \n \n magnetic,\n \n \n \n \n \n thermal,\n \n \n \n \n \n uses,\n \n \n \n \n \n brittle,\n \n \n \n \n \n alloys,\n \n \n \n \n \n shiny,\n \n \n \n \n \n dull,\n \n \n \n \n \n magnetism,\n \n \n \n \n \n attraction,\n \n \n \n \n \n poles,\n \n \n \n \n \n electromagnets,\n \n \n \n \n \n mixtures,\n \n \n \n \n \n crude oil,\n \n \n \n \n \n petroleum,\n \n \n \n \n \n column,\n \n \n \n \n \n adaptation,\n \n \n \n \n \n survival,\n \n \n \n \n \n population,\n \n \n \n \n \n competition,\n \n \n \n \n \n predator,\n \n \n \n \n \n organism,\n \n \n \n \n \n relationships,\n \n \n \n \n \n habitat,\n \n \n \n \n \n hydrogen,\n \n \n \n \n \n reactivity,\n \n \n \n \n \n salt,\n \n \n \n \n \n primary consumer,\n \n \n \n \n \n feeding relationships,\n \n \n \n \n \n secondary consumer,\n \n \n \n \n \n embryo,\n \n \n \n \n \n cell,\n \n \n \n \n \n sperm cell,\n \n \n \n \n \n formation,\n \n \n \n \n \n exhale,\n \n \n \n \n \n inhale,\n \n \n \n \n \n nervous system,\n \n \n \n \n \n stimulus,\n \n \n \n \n \n reproduction,\n \n \n \n \n \n large intestine,\n \n \n \n \n \n anus,\n \n \n \n \n \n waste,\n \n \n \n \n \n breathing,\n \n \n \n \n \n excretion,\n \n \n \n \n \n reproductive system,\n \n \n \n \n \n bones,\n \n \n \n \n \n esophagus,\n \n \n \n \n \n stomach,\n \n \n \n \n \n small intestine,\n \n \n \n \n \n testes,\n \n \n \n \n \n body changes,\n \n \n \n \n \n pancreas,\n \n \n \n \n \n tendons,\n \n \n \n \n \n skull,\n \n \n \n \n \n factors,\n \n \n \n \n \n leaf,\n \n \n \n \n \n units,\n \n \n \n \n \n particle,\n \n \n \n \n \n groups,\n \n \n \n \n \n non-metals,\n \n \n \n \n \n non-magnetic,\n \n \n \n \n \n period,\n \n \n \n \n \n menstruation,\n \n \n \n \n \n ovum,\n \n \n \n \n \n ovary,\n \n \n \n \n \n puberty,\n \n \n \n \n \n sex,\n \n \n \n \n \n PMS,\n \n \n \n \n \n premenstrual syndrome,\n \n \n \n \n \n pre-menstrual syndrome,\n \n \n \n \n \n parallel,\n \n \n \n \n \n series,\n \n \n \n \n \n circuits,\n \n \n \n \n \n short circuit,\n \n \n \n \n \n bulbs,\n \n \n \n \n \n battery,\n \n \n \n \n \n series circuit,\n \n \n \n \n \n emissions,\n \n \n \n \n \n renewable energy,\n \n \n \n \n \n carbon monoxide,\n \n \n \n \n \n atmosphere,\n \n \n \n \n \n global warming,\n \n \n \n \n \n plant respiration,\n \n \n \n \n \n aerobic respiration,\n \n \n \n \n \n bacteria,\n \n \n \n \n \n balanced,\n \n \n \n \n \n friction,\n \n \n \n \n \n balanced forces,\n \n \n \n \n \n driving,\n \n \n \n \n \n force diagram,\n \n \n \n \n \n absorb,\n \n \n \n \n \n color,\n \n \n \n \n \n non-luminous,\n \n \n \n \n \n mucus,\n \n \n \n \n \n enzymes,\n \n \n \n \n \n proteins,\n \n \n \n \n \n mouth,\n \n \n \n \n \n soluble,\n \n \n \n \n \n evaporation,\n \n \n \n \n \n chemical reaction,\n \n \n \n \n \n magnesium oxide,\n \n \n \n \n \n chemical,\n \n \n \n \n \n corrosion,\n \n \n \n \n \n smelting,\n \n \n \n \n \n electrolysis,\n \n \n \n \n \n seeds,\n \n \n \n \n \n stem,\n \n \n \n \n \n leaves,\n \n \n \n \n \n flower,\n \n \n \n \n \n root hairs,\n \n \n \n \n \n pollen,\n \n \n \n \n \n measuring,\n \n \n \n \n \n newtons,\n \n \n \n \n \n solvents,\n \n \n \n \n \n species,\n \n \n \n \n \n variation,\n \n \n \n \n \n materials,\n \n \n \n \n \n refraction,\n \n \n \n \n \n diagrams,\n \n \n \n \n \n transparent,\n \n \n \n \n \n travel,\n \n \n \n \n \n medium,\n \n \n \n \n \n energy conversion,\n \n \n \n \n \n wind energy,\n \n \n \n \n \n clean energy,\n \n \n \n \n \n resources,\n \n \n \n \n \n energy resources,\n \n \n \n \n \n weather,\n \n \n \n \n \n hydroelectric energy,\n \n \n \n \n \n fish,\n \n \n \n \n \n habitats,\n \n \n \n \n \n camel,\n \n \n \n \n \n conservation,\n \n \n \n \n \n cold,\n \n \n \n \n \n polar,\n \n \n \n \n \n cooling,\n \n \n \n \n \n weathering,\n \n \n \n \n \n rock,\n \n \n \n \n \n rocks,\n \n \n \n \n \n limestone,\n \n \n \n \n \n space,\n \n \n \n \n \n solar,\n \n \n \n \n \n solar system,\n \n \n \n \n \n moon,\n \n \n \n \n \n gravitational pull,\n \n \n \n \n \n boiling point,\n \n \n \n \n \n melting point,\n \n \n \n \n \n boil,\n \n \n \n \n \n plant,\n \n \n \n \n \n vibration,\n \n \n \n \n \n hearing,\n \n \n \n \n \n loudness,\n \n \n \n \n \n lightning,\n \n \n \n \n \n loud,\n \n \n \n \n \n contraction,\n \n \n \n \n \n expansion,\n \n \n \n \n \n expand,\n \n \n \n \n \n contract,\n \n \n \n \n \n cellulose,\n \n \n \n \n \n cytoplasm,\n \n \n \n \n \n nucleus,\n \n \n \n \n \n vacuole,\n \n \n \n \n \n solution,\n \n \n \n \n \n ph,\n \n \n \n \n \n power station,\n \n \n \n \n \n neutral,\n \n \n \n \n \n neutralize,\n \n \n \n \n \n base,\n \n \n \n \n \n skeleton,\n \n \n \n \n \n nutrition,\n \n \n \n \n \n muscles,\n \n \n \n \n \n electric,\n \n \n \n \n \n energy transfer,\n \n \n \n \n \n insulator,\n \n \n \n \n \n conduct,\n \n \n \n \n \n conductor,\n \n \n \n \n \n generator,\n \n \n \n \n \n sunlight,\n \n \n \n \n \n gas,\n \n \n \n \n \n cancer,\n \n \n \n \n \n molecules,\n \n \n \n \n \n heat conductor,\n \n \n \n \n \n heat conduction,\n \n \n \n \n \n tire,\n \n \n \n \n \n react,\n \n \n \n \n \n agriculture,\n \n \n \n \n \n signals,\n \n \n \n \n \n energy loss,\n \n \n \n \n \n energy flow,\n \n \n \n \n \n pivot,\n \n \n \n \n \n seesaw,\n \n \n \n \n \n lever,\n \n \n \n \n \n food production,\n \n \n \n \n \n hot,\n \n \n \n \n \n joules,\n \n \n \n \n \n appliance,\n \n \n \n \n \n medicines,\n \n \n \n \n formulas,\n \n \n \n number,\n \n \n \n rules,\n \n \n \n molecule,\n \n \n \n names,\n \n \n \n nitroglycerine,\n \n \n \n word equations,\n \n \n \n word equations for reactions,\n \n \n \n naming compounds,\n \n \n \n prefixes,\n \n \n \n copper sulfate,\n \n \n \n naming,\n \n \n \n chromosomes,\n \n \n \n inheritance,\n \n \n \n genetic modification,\n \n \n \n fingerprints,\n \n \n \n inherited characteristics,\n \n \n \n selective breeding,\n \n \n \n breeding,\n \n \n \n cross breeding,\n \n \n \n modify,\n \n \n \n offspring,\n \n \n \n DNA molecules,\n \n \n \n DNA,\n \n \n \n generation,\n \n \n \n breed,\n \n \n \n descendent,\n \n \n \n desired characteristics,\n \n \n \n ray,\n \n \n \n drawing,\n \n \n \n diffuse\xc2\xa0reflection,\n \n \n \n different\xc2\xa0surfaces,\n \n \n \n glossy\xc2\xa0surface,\n \n \n \n rough\xc2\xa0surface,\n \n \n \n reflected\xc2\xa0ray,\n \n \n \n smooth\xc2\xa0surface,\n \n \n \n irregular\xc2\xa0surface,\n \n \n \n angle\xc2\xa0of\xc2\xa0incidence,\n \n \n \n mirrors,\n \n \n \n periscopes,\n \n \n \n reflection\xc2\xa0diagrams,\n \n \n \n boiling\xc2\xa0point,\n \n \n \n melting\xc2\xa0point,\n \n \n \n properties\xc2\xa0of\xc2\xa0metals,\n \n \n \n malleable,\n \n \n \n sonorous,\n \n \n \n state\xc2\xa0at\xc2\xa0room\xc2\xa0temperature,\n \n \n \n magnetic\xc2\xa0properties,\n \n \n \n thermal\xc2\xa0conductivity,\n \n \n \n electrical\xc2\xa0conductivity,\n \n \n \n uses\xc2\xa0of\xc2\xa0metals,\n \n \n \n magnetic\xc2\xa0metals,\n \n \n \n non-magnetic\xc2\xa0metals,\n \n \n \n conductors\xc2\xa0of\xc2\xa0heat,\n \n \n \n heat\xc2\xa0conductors,\n \n \n \n heat\xc2\xa0conduction,\n \n \n \n conductors\xc2\xa0of\xc2\xa0electricity,\n \n \n \n electicity\xc2\xa0conduction,\n \n \n \n malleability,\n \n \n \n renewable\xc2\xa0energy,\n \n \n \n solar\xc2\xa0energy,\n \n \n \n wind\xc2\xa0energy,\n \n \n \n chemical\xc2\xa0energy,\n \n \n \n Transfer\xc2\xa0of\xc2\xa0energy,\n \n \n \n fossil\xc2\xa0fuels,\n \n \n \n wave\xc2\xa0energy,\n \n \n \n natural\xc2\xa0gas,\n \n \n \n non-renewable\xc2\xa0energy,\n \n \n \n energy\xc2\xa0sources,\n \n \n \n wood,\n \n \n \n movement\xc2\xa0of\xc2\xa0air,\n \n \n \n movement\xc2\xa0of\xc2\xa0water,\n \n \n \n water\xc2\xa0movement,\n \n \n \n air\xc2\xa0movement,\n \n \n \n sun's,\n \n \n \n compass,\n \n \n \n cobalt,\n \n \n \n nickel,\n \n \n \n repulsion,\n \n \n \n bar magnet,\n \n \n \n magnetic materials,\n \n \n \n magnetic fields,\n \n \n \n permanent,\n \n \n \n steel,\n \n \n \n magnetic compass,\n \n \n \n magnetic field lines,\n \n \n \n fractions,\n \n \n \n pure substances,\n \n \n \n seawater,\n \n \n \n metal alloys,\n \n \n \n bathyscaphe,\n \n \n \n fractionating,\n \n \n \n jet,\n \n \n \n engine,\n \n \n \n impurities,\n \n \n \n impurity,\n \n \n \n variable,\n \n \n \n predation,\n \n \n \n interaction,\n \n \n \n predator\xe2\x80\x93prey\xc2\xa0relationships,\n \n \n \n population\xc2\xa0size,\n \n \n \n human\xc2\xa0competition,\n \n \n \n community,\n \n \n \n food\xc2\xa0sources,\n \n \n \n sodium,\n \n \n \n magnesium,\n \n \n \n the\xc2\xa0reactivity\xc2\xa0of\xc2\xa0metals,\n \n \n \n naming\xc2\xa0salts,\n \n \n \n reactivity\xc2\xa0of\xc2\xa0metals,\n \n \n \n oxygen\xc2\xa0reaction,\n \n \n \n water\xc2\xa0reaction,\n \n \n \n acid\xc2\xa0reaction,\n \n \n \n oxides,\n \n \n \n tarnish,\n \n \n \n metal\xc2\xa0oxides,\n \n \n \n hydrogen\xc2\xa0gas,\n \n \n \n hindenburg,\n \n \n \n uses\xc2\xa0of\xc2\xa0salts,\n \n \n \n examples\xc2\xa0of\xc2\xa0salts,\n \n \n \n food chain,\n \n \n \n food webs,\n \n \n \n top predator,\n \n \n \n consumer,\n \n \n \n carnivore,\n \n \n \n producer,\n \n \n \n marine food web,\n \n \n \n omnivore,\n \n \n \n herbivore,\n \n \n \n placenta,\n \n \n \n zygote,\n \n \n \n egg cell,\n \n \n \n implantation,\n \n \n \n fetal,\n \n \n \n birth,\n \n \n \n baby,\n \n \n \n fallopian tube,\n \n \n \n fallopian,\n \n \n \n development of the fetus,\n \n \n \n blood,\n \n \n \n toxic,\n \n \n \n organ,\n \n \n \n systems,\n \n \n \n human organ systems,\n \n \n \n femur,\n \n \n \n sternum,\n \n \n \n gametes,\n \n \n \n heart,\n \n \n \n respiratory system,\n \n \n \n digestive system,\n \n \n \n circulatory system,\n \n \n \n circulation,\n \n \n \n excretory system,\n \n \n \n sense organs,\n \n \n \n sensory,\n \n \n \n nerves,\n \n \n \n endocrine system,\n \n \n \n muscle system,\n \n \n \n uscles,\n \n \n \n skeletal system,\n \n \n \n inhalation,\n \n \n \n exhalation,\n \n \n \n diaphragm,\n \n \n \n kidney,\n \n \n \n urine,\n \n \n \n spinal cord,\n \n \n \n peripheral nerves,\n \n \n \n response,\n \n \n \n ovaries,\n \n \n \n eggs,\n \n \n \n glands,\n \n \n \n tissues,\n \n \n \n thyroid,\n \n \n \n triceps,\n \n \n \n biceps,\n \n \n \n impulses,\n \n \n \n quadriceps,\n \n \n \n pectorals,\n \n \n \n pelvis,\n \n \n \n carpals,\n \n \n \n rate,\n \n \n \n chloroplasts,\n \n \n \n affecting,\n \n \n \n factors affecting photosynthesis,\n \n \n \n palisade cells,\n \n \n \n greenhouse,\n \n \n \n changing,\n \n \n \n graph,\n \n \n \n converting,\n \n \n \n time,\n \n \n \n calculation,\n \n \n \n change,\n \n \n \n velocity,\n \n \n \n speed calculations,\n \n \n \n speed calculation,\n \n \n \n average speed,\n \n \n \n speed equation triangle,\n \n \n \n convert,\n \n \n \n graphical representation,\n \n \n \n units of speed,\n \n \n \n speed equation,\n \n \n \n speedometer,\n \n \n \n periodic table,\n \n \n \n noble gases,\n \n \n \n reactive metals,\n \n \n \n non-elements,\n \n \n \n chemical names,\n \n \n \n chemical symbols,\n \n \n \n conductors,\n \n \n \n shape,\n \n \n \n theory,\n \n \n \n Particle theory,\n \n \n \n flow,\n \n \n \n factors affecting particles,\n \n \n \n model particle arrangement,\n \n \n \n egg,\n \n \n \n vulva,\n \n \n \n human reproduction,\n \n \n \n reproduce,\n \n \n \n male female,\n \n \n \n menstrual cycle,\n \n \n \n penis,\n \n \n \n scrotum,\n \n \n \n sperm cells,\n \n \n \n egg cells,\n \n \n \n fallopian tubes,\n \n \n \n vagina,\n \n \n \n uterus lining,\n \n \n \n uterine lining,\n \n \n \n menstrual,\n \n \n \n fertillization,\n \n \n \n sexual intercourse,\n \n \n \n intercourse,\n \n \n \n circuit diagrams,\n \n \n \n electrical circuit,\n \n \n \n symbol,\n \n \n \n series and parallel circuits,\n \n \n \n power supply,\n \n \n \n effects,\n \n \n \n the effects of combustion,\n \n \n \n reducing pollution,\n \n \n \n catalytic converter,\n \n \n \n smog,\n \n \n \n effects of combustion,\n \n \n \n precipitation,\n \n \n \n rain,\n \n \n \n sulfur dioxide,\n \n \n \n oxides of nitrogen,\n \n \n \n stomata,\n \n \n \n respiration in plants,\n \n \n \n disease,\n \n \n \n infectious disease,\n \n \n \n fighting,\n \n \n \n fighting disease,\n \n \n \n immunity,\n \n \n \n artificial immunity,\n \n \n \n antibodies,\n \n \n \n viruses,\n \n \n \n human defense system,\n \n \n \n microorganisms,\n \n \n \n bacterial disease infection,\n \n \n \n viral,\n \n \n \n fungus,\n \n \n \n antibiotics,\n \n \n \n non-infectious diseases,\n \n \n \n unbalanced,\n \n \n \n forces,\n \n \n \n balanced and unbalanced forces,\n \n \n \n push,\n \n \n \n upward force,\n \n \n \n unbalanced forces,\n \n \n \n pull,\n \n \n \n effect of forces,\n \n \n \n billiard ball,\n \n \n \n upward,\n \n \n \n downward force,\n \n \n \n downward,\n \n \n \n unbalance,\n \n \n \n space probe,\n \n \n \n accelerate,\n \n \n \n decelerate,\n \n \n \n acceleration,\n \n \n \n deceleration,\n \n \n \n stationary,\n \n \n \n subtraction,\n \n \n \n prism,\n \n \n \n object,\n \n \n \n white light,\n \n \n \n dispersion,\n \n \n \n dispersion of light,\n \n \n \n color addition,\n \n \n \n colored filters,\n \n \n \n colored objects,\n \n \n \n color subtraction,\n \n \n \n white,\n \n \n \n spectrum,\n \n \n \n wavelength,\n \n \n \n splitting,\n \n \n \n primary colors,\n \n \n \n secondary colors,\n \n \n \n absorbed,\n \n \n \n reflect,\n \n \n \n color of objects,\n \n \n \n flags,\n \n \n \n ions,\n \n \n \n rectum,\n \n \n \n urea,\n \n \n \n absorption\xc2\xa0and\xc2\xa0waste,\n \n \n \n small\xc2\xa0intestine,\n \n \n \n food\xc2\xa0absorption,\n \n \n \n kidneys,\n \n \n \n defecation,\n \n \n \n regulating,\n \n \n \n dialysis,\n \n \n \n elimination,\n \n \n \n high-fiber\xc2\xa0foods,\n \n \n \n villi,\n \n \n \n emulsify,\n \n \n \n saliva,\n \n \n \n gullet,\n \n \n \n liver,\n \n \n \n malnutrition,\n \n \n \n body mass,\n \n \n \n insoluble particles,\n \n \n \n soluble particles,\n \n \n \n teeth,\n \n \n \n gastric juices,\n \n \n \n pepsin,\n \n \n \n bile,\n \n \n \n emulsifies,\n \n \n \n fat,\n \n \n \n gut,\n \n \n \n lipase,\n \n \n \n carbohydrase,\n \n \n \n protease,\n \n \n \n duodenum,\n \n \n \n solid waste,\n \n \n \n feces,\n \n \n \n solvent,\n \n \n \n pigment,\n \n \n \n separating,\n \n \n \n separating mixtures,\n \n \n \n distillation,\n \n \n \n fractional distillation,\n \n \n \n ink,\n \n \n \n separate,\n \n \n \n filtration,\n \n \n \n chromatography,\n \n \n \n constituent,\n \n \n \n limewater,\n \n \n \n burning,\n \n \n \n anaerobic respiration,\n \n \n \n equation for aerobic respiration,\n \n \n \n equation for anaerobic respiration,\n \n \n \n energy from respiration,\n \n \n \n lactic acid,\n \n \n \n sugars,\n \n \n \n demand for energy,\n \n \n \n rusting,\n \n \n \n reduction,\n \n \n \n nature of chemical reactions,\n \n \n \n importance of chemical reactions,\n \n \n \n types of chemical reaction,\n \n \n \n useful chemical reactions,\n \n \n \n chemical change,\n \n \n \n reactants,\n \n \n \n oxidation,\n \n \n \n decomposition,\n \n \n \n fermentation,\n \n \n \n hazardous,\n \n \n \n food spoilage,\n \n \n \n prevention,\n \n \n \n anther,\n \n \n \n pollination,\n \n \n \n flowering,\n \n \n \n plant nutrition,\n \n \n \n flowering plant reproduction,\n \n \n \n plant reproduction,\n \n \n \n fruit,\n \n \n \n plant organs,\n \n \n \n plant fertilization,\n \n \n \n seed dispersal,\n \n \n \n plant pore,\n \n \n \n plant sensitivity,\n \n \n \n plant excretion,\n \n \n \n plant movement,\n \n \n \n water transport,\n \n \n \n plant absorption,\n \n \n \n petal,\n \n \n \n stigma,\n \n \n \n filament,\n \n \n \n ovules,\n \n \n \n sepal,\n \n \n \n pollen grains,\n \n \n \n stamen,\n \n \n \n carpel,\n \n \n \n structure of flowering plants,\n \n \n \n gravitational attraction,\n \n \n \n weightless,\n \n \n \n gravitation,\n \n \n \n falling,\n \n \n \n objects,\n \n \n \n mass and weight,\n \n \n \n force meter,\n \n \n \n mixture,\n \n \n \n solutions,\n \n \n \n solute,\n \n \n \n solubility,\n \n \n \n dissolving,\n \n \n \n saturated solutions,\n \n \n \n saturated,\n \n \n \n saturate,\n \n \n \n types of solvents,\n \n \n \n salt solution,\n \n \n \n variation between species,\n \n \n \n variation among species,\n \n \n \n human variation,\n \n \n \n continuous variation.,\n \n \n \n pencil,\n \n \n \n bent,\n \n \n \n bent pencil,\n \n \n \n ray of light,\n \n \n \n light ray,\n \n \n \n incident ray,\n \n \n \n refracted ray,\n \n \n \n incident,\n \n \n \n incidence,\n \n \n \n angle of incidence,\n \n \n \n angle of refraction,\n \n \n \n emergent ray,\n \n \n \n normal,\n \n \n \n path of light,\n \n \n \n transparent materials,\n \n \n \n refraction of light,\n \n \n \n light refraction,\n \n \n \n speed of light,\n \n \n \n refraction examples,\n \n \n \n refraction diagrams,\n \n \n \n examples of refraction,\n \n \n \n direction,\n \n \n \n rays,\n \n \n \n bend,\n \n \n \n optical effects,\n \n \n \n incident light ray,\n \n \n \n comparison,\n \n \n \n wind turbine,\n \n \n \n solar panel,\n \n \n \n windmill,\n \n \n \n solar-powered house,\n \n \n \n gas-fired power station,\n \n \n \n power plant,\n \n \n \n energy production,\n \n \n \n house,\n \n \n \n thermal energy,\n \n \n \n forms of energy,\n \n \n \n circulation of energy,\n \n \n \n fuel shortages,\n \n \n \n tidal energy,\n \n \n \n tide,\n \n \n \n conserve,\n \n \n \n forest habitats,\n \n \n \n cave,\n \n \n \n ant,\n \n \n \n ocean habitats,\n \n \n \n hot habitats,\n \n \n \n dry habitats,\n \n \n \n soil habitats,\n \n \n \n forest,\n \n \n \n parasites,\n \n \n \n tropical,\n \n \n \n rainforest,\n \n \n \n mountain top,\n \n \n \n mountaintop,\n \n \n \n polar region,\n \n \n \n antarctica,\n \n \n \n arctic,\n \n \n \n seaweed,\n \n \n \n coral,\n \n \n \n desert,\n \n \n \n cacti,\n \n \n \n trees,\n \n \n \n succulents,\n \n \n \n meerkat,\n \n \n \n ermine,\n \n \n \n woodland plants,\n \n \n \n slug,\n \n \n \n mole,\n \n \n \n beetle,\n \n \n \n earthworm,\n \n \n \n mite,\n \n \n \n springtail,\n \n \n \n nematode,\n \n \n \n erosion,\n \n \n \n volcano,\n \n \n \n rock formation,\n \n \n \n marble,\n \n \n \n building materials,\n \n \n \n sedimentary rocks,\n \n \n \n sedimentary,\n \n \n \n sediment,\n \n \n \n igneous rocks,\n \n \n \n igneous,\n \n \n \n metamorphic rocks,\n \n \n \n metamorphize,\n \n \n \n rock cycle,\n \n \n \n cycle,\n \n \n \n uses of rocks,\n \n \n \n metamorphic,\n \n \n \n composition of rocks,\n \n \n \n rock composition,\n \n \n \n composition,\n \n \n \n examples of rocks,\n \n \n \n identifying minerals,\n \n \n \n cemented,\n \n \n \n molten,\n \n \n \n magma,\n \n \n \n erode,\n \n \n \n deposition,\n \n \n \n deposit,\n \n \n \n biodiversity,\n \n \n \n exoskeleton,\n \n \n \n spores,\n \n \n \n classification,\n \n \n \n taxonomy,\n \n \n \n fungi,\n \n \n \n prokaryotes,\n \n \n \n protista,\n \n \n \n protists,\n \n \n \n flowering plant,\n \n \n \n fern,\n \n \n \n conifer,\n \n \n \n molluscs,\n \n \n \n mammal,\n \n \n \n reptile,\n \n \n \n bird,\n \n \n \n amphibian,\n \n \n \n invertebrates,\n \n \n \n vertebrates,\n \n \n \n arthropods,\n \n \n \n flatworms,\n \n \n \n annelids,\n \n \n \n echinoderms,\n \n \n \n coelenterates,\n \n \n \n organisms,\n \n \n \n groups of organisms,\n \n \n \n taxonomic groups,\n \n \n \n animal classification,\n \n \n \n plant classification,\n \n \n \n kingdoms,\n \n \n \n phylum,\n \n \n \n vascular system,\n \n \n \n vascular,\n \n \n \n molds,\n \n \n \n moss,\n \n \n \n alga,\n \n \n \n system,\n \n \n \n size,\n \n \n \n Absorb,\n \n \n \n The solar system,\n \n \n \n galaxy,\n \n \n \n Milky Way,\n \n \n \n vacuum,\n \n \n \n star,\n \n \n \n night sky,\n \n \n \n universe,\n \n \n \n cluster,\n \n \n \n cosmic bodies,\n \n \n \n belt of asteroids,\n \n \n \n asteroids,\n \n \n \n comet,\n \n \n \n belt,\n \n \n \n dwarf giant,\n \n \n \n meteor,\n \n \n \n inner planets,\n \n \n \n outer planets,\n \n \n \n gravitational force,\n \n \n \n force of attraction,\n \n \n \n path,\n \n \n \n galaxies,\n \n \n \n light years,\n \n \n \n distances in space,\n \n \n \n light-year,\n \n \n \n disc-shaped,\n \n \n \n immensity,\n \n \n \n states of matter,\n \n \n \n three states of matter,\n \n \n \n changing states,\n \n \n \n states of water,\n \n \n \n compressed,\n \n \n \n compressibility,\n \n \n \n hydraulic arm,\n \n \n \n nutrient deficiency,\n \n \n \n nitrogen,\n \n \n \n potassium,\n \n \n \n nitrates,\n \n \n \n root systems,\n \n \n \n root hair cells,\n \n \n \n phosphates,\n \n \n \n fertilizers,\n \n \n \n pale plants,\n \n \n \n NPK,\n \n \n \n artificial fertilizers,\n \n \n \n natural fertilizers,\n \n \n \n adolescence,\n \n \n \n skin,\n \n \n \n sweat,\n \n \n \n males,\n \n \n \n females,\n \n \n \n adolescent,\n \n \n \n emotional changes,\n \n \n \n emotion,\n \n \n \n reproductive organs,\n \n \n \n childhood,\n \n \n \n adulthood,\n \n \n \n growth rates,\n \n \n \n acne,\n \n \n \n facial discolorations,\n \n \n \n sebum,\n \n \n \n premenstrual behavior,\n \n \n \n frequency,\n \n \n \n sound\xc2\xa0energy,\n \n \n \n ultrasound,\n \n \n \n sound\xc2\xa0pitch,\n \n \n \n high-pitched\xc2\xa0sound,\n \n \n \n sound\xc2\xa0vibration,\n \n \n \n wave\xc2\xa0vibration,\n \n \n \n low-pitched\xc2\xa0sound,\n \n \n \n sound\xc2\xa0frequency,\n \n \n \n sound\xc2\xa0amplitude,\n \n \n \n wave\xc2\xa0amplitude,\n \n \n \n pitch,\n \n \n \n amplitude,\n \n \n \n oscilloscope,\n \n \n \n electric\xc2\xa0bell,\n \n \n \n sound\xc2\xa0travel,\n \n \n \n sound\xc2\xa0waves,\n \n \n \n speed\xc2\xa0of\xc2\xa0sound,\n \n \n \n ringing,\n \n \n \n light\xc2\xa0travel,\n \n \n \n vibrate,\n \n \n \n vibrating,\n \n \n \n hear,\n \n \n \n sound\xc2\xa0production,\n \n \n \n guitar\xc2\xa0strings,\n \n \n \n echoes,\n \n \n \n echolocation,\n \n \n \n quiet,\n \n \n \n volume\xc2\xa0control,\n \n \n \n high\xc2\xa0frequency,\n \n \n \n low\xc2\xa0frequency,\n \n \n \n high-frequency\xc2\xa0sound,\n \n \n \n low-frequency\xc2\xa0sond,\n \n \n \n nocturnal,\n \n \n \n diurnal,\n \n \n \n seasonal changes,\n \n \n \n hibernation,\n \n \n \n migration,\n \n \n \n specialized organisms,\n \n \n \n animal adaptations,\n \n \n \n plant adaptations,\n \n \n \n daily changes,\n \n \n \n camouflage,\n \n \n \n geological,\n \n \n \n soil\xc2\xa0composition,\n \n \n \n acid\xc2\xa0rain,\n \n \n \n rain\xc2\xa0water,\n \n \n \n chemical\xc2\xa0weathering,\n \n \n \n carbonic\xc2\xa0acid,\n \n \n \n physical\xc2\xa0weathering,\n \n \n \n biological\xc2\xa0weathering,\n \n \n \n biological,\n \n \n \n examples\xc2\xa0of\xc2\xa0weathering,\n \n \n \n freeze-and-thaw\xc2\xa0weathering,\n \n \n \n thaw,\n \n \n \n thawing,\n \n \n \n cell membrane,\n \n \n \n animal,\n \n \n \n animal and plant cells,\n \n \n \n red blood cell,\n \n \n \n nerve cell,\n \n \n \n organ and chloroplast,\n \n \n \n animal cell,\n \n \n \n plant cell,\n \n \n \n cell wall,\n \n \n \n tissue,\n \n \n \n levels of organization,\n \n \n \n specialized cells,\n \n \n \n cellular function,\n \n \n \n organ systems,\n \n \n \n cell components,\n \n \n \n white blood cell,\n \n \n \n stings,\n \n \n \n neutralization,\n \n \n \n making salts,\n \n \n \n acid indigestion,\n \n \n \n acidic soils,\n \n \n \n neutralization reactions,\n \n \n \n types of salt,\n \n \n \n indigestion,\n \n \n \n heartburn,\n \n \n \n practical uses,\n \n \n \n ph of soil,\n \n \n \n liming soil,\n \n \n \n neutralization of acidic gases,\n \n \n \n power station emissions,\n \n \n \n life,\n \n \n \n processes,\n \n \n \n respiration reproduction,\n \n \n \n sensitivity,\n \n \n \n living,\n \n \n \n nonliving,\n \n \n \n non-living,\n \n \n \n life cycle,\n \n \n \n growth stages,\n \n \n \n shoots,\n \n \n \n asexual reproduction,\n \n \n \n clones,\n \n \n \n organs,\n \n \n \n cartilage,\n \n \n \n ligaments,\n \n \n \n the skeleton and movement,\n \n \n \n antagonistis,\n \n \n \n protection,\n \n \n \n support,\n \n \n \n joints,\n \n \n \n muscle pairs,\n \n \n \n bone hardening,\n \n \n \n spine,\n \n \n \n vital,\n \n \n \n framework,\n \n \n \n moveable,\n \n \n \n non-movable,\n \n \n \n gliding,\n \n \n \n hinge,\n \n \n \n ball-and-socket,\n \n \n \n ball and socket,\n \n \n \n wax,\n \n \n \n physical\xc2\xa0changes,\n \n \n \n hard,\n \n \n \n physical\xc2\xa0changes\xc2\xa0in\xc2\xa0materials,\n \n \n \n thermal\xc2\xa0expansion,\n \n \n \n thermostats,\n \n \n \n transfer\xc2\xa0of\xc2\xa0energy,\n \n \n \n appearance,\n \n \n \n cooling\xc2\xa0curves,\n \n \n \n hardness,\n \n \n \n states,\n \n \n \n heating\xc2\xa0curve,\n \n \n \n symbols,\n \n \n \n cellenergy,\n \n \n \n electrical circuits,\n \n \n \n voltage,\n \n \n \n voltmeter,\n \n \n \n static electricity,\n \n \n \n electrical components,\n \n \n \n drawing circuits,\n \n \n \n electrons,\n \n \n \n charge,\n \n \n \n negative charge,\n \n \n \n positive charge,\n \n \n \n van de graaff generator,\n \n \n \n electrical symbols,\n \n \n \n circuit boards,\n \n \n \n insulate,\n \n \n \n resist,\n \n \n \n generating,\n \n \n \n uranium,\n \n \n \n plutonium,\n \n \n \n fossil fuel,\n \n \n \n generating electricity,\n \n \n \n electricity generation,\n \n \n \n nuclear energy,\n \n \n \n steam,\n \n \n \n wave energy,\n \n \n \n non-renewable energy,\n \n \n \n advantages,\n \n \n \n disadvantages,\n \n \n \n PV,\n \n \n \n photovoltaic cells,\n \n \n \n photovoltaic,\n \n \n \n electrical current,\n \n \n \n radioactive,\n \n \n \n fission,\n \n \n \n nuclear,\n \n \n \n light year,\n \n \n \n sun,\n \n \n \n northern sky,\n \n \n \n southern sky,\n \n \n \n andromeda,\n \n \n \n aries,\n \n \n \n perseus,\n \n \n \n cassiopeia,\n \n \n \n lacerta,\n \n \n \n cepheus,\n \n \n \n cygnus,\n \n \n \n lyra,\n \n \n \n draco,\n \n \n \n ursa minor,\n \n \n \n litlle bear,\n \n \n \n hercules,\n \n \n \n corona borealis,\n \n \n \n bo\xc3\xb6tes,\n \n \n \n ursa major,\n \n \n \n great bear,\n \n \n \n gemini,\n \n \n \n auriga,\n \n \n \n leo,\n \n \n \n coma berenices,\n \n \n \n eridanus,\n \n \n \n hydrus,\n \n \n \n dorado,\n \n \n \n columba,\n \n \n \n puppis,\n \n \n \n carina,\n \n \n \n vela,\n \n \n \n antlia,\n \n \n \n centaurus,\n \n \n \n hydra,\n \n \n \n lupus,\n \n \n \n scorpius,\n \n \n \n sagittarius,\n \n \n \n triangulum,\n \n \n \n corona australis,\n \n \n \n problems,\n \n \n \n addictive,\n \n \n \n carcinogenic,\n \n \n \n smoking,\n \n \n \n chemicals,\n \n \n \n cigarette,\n \n \n \n smoke,\n \n \n \n tobacco,\n \n \n \n heart disease,\n \n \n \n nicotine,\n \n \n \n addiction,\n \n \n \n high blood pressure,\n \n \n \n heart attack,\n \n \n \n tar,\n \n \n \n carcinogen,\n \n \n \n unborn baby,\n \n \n \n pregnant,\n \n \n \n death,\n \n \n \n illness,\n \n \n \n cell\xc2\xa0membrane,\n \n \n \n red\xc2\xa0blood\xc2\xa0cell,\n \n \n \n cilia,\n \n \n \n dendrite,\n \n \n \n nervous\xc2\xa0system,\n \n \n \n nerve\xc2\xa0cell,\n \n \n \n life\xc2\xa0processes,\n \n \n \n hair,\n \n \n \n sperm\xc2\xa0cell,\n \n \n \n specialized\xc2\xa0cells,\n \n \n \n cell\xc2\xa0specialization,\n \n \n \n specialization,\n \n \n \n root\xc2\xa0hair\xc2\xa0cell,\n \n \n \n capillaries,\n \n \n \n hemoglobin,\n \n \n \n blood\xc2\xa0vessels,\n \n \n \n chromosome,\n \n \n \n genetic\xc2\xa0information,\n \n \n \n egg\xc2\xa0cell,\n \n \n \n female\xc2\xa0cell,\n \n \n \n fertilize,\n \n \n \n corona\xc2\xa0radiata,\n \n \n \n zona\xc2\xa0pellucida,\n \n \n \n axon,\n \n \n \n electrical\xc2\xa0impulse,\n \n \n \n specialized.,\n \n \n \n atom,\n \n \n \n copper sulfide,\n \n \n \n examples of chemical reactions,\n \n \n \n combustion of hydrogen,\n \n \n \n making water,\n \n \n \n Properties of non-metals,\n \n \n \n state at room temperature,\n \n \n \n thermal conductivity,\n \n \n \n electrical conductivity,\n \n \n \n nonmetals,\n \n \n \n appearance of non-metals,\n \n \n \n state,\n \n \n \n strength,\n \n \n \n conductivity,\n \n \n \n durable,\n \n \n \n causes,\n \n \n \n Causes of variation,\n \n \n \n moisture,\n \n \n \n inherited variation,\n \n \n \n environmental variation,\n \n \n \n environment human characteristics,\n \n \n \n variation in plants,\n \n \n \n plant variation,\n \n \n \n combining genes,\n \n \n \n environmental factors,\n \n \n \n blood type,\n \n \n \n inherited diseases,\n \n \n \n dieseases,\n \n \n \n eye color,\n \n \n \n skin color attached earlobes,\n \n \n \n earlobes,\n \n \n \n language,\n \n \n \n constant,\n \n \n \n cyclist,\n \n \n \n frictional forces,\n \n \n \n force of friction,\n \n \n \n cycling,\n \n \n \n balancing friction,\n \n \n \n balancing frictional forces,\n \n \n \n air resistance,\n \n \n \n using friction,\n \n \n \n reducing friction,\n \n \n \n thrust,\n \n \n \n lift,\n \n \n \n drag,\n \n \n \n constant speed,\n \n \n \n parachute,\n \n \n \n vehicle,\n \n \n \n car,\n \n \n \n braking,\n \n \n \n grip,\n \n \n \n sports,\n \n \n \n aircraft,\n \n \n \n insoluble,\n \n \n \n preventing corrosion,\n \n \n \n acid reactions,\n \n \n \n chemical weathering,\n \n \n \n hydrogen gas,\n \n \n \n carbonate,\n \n \n \n metal oxide,\n \n \n \n metal hydroxide,\n \n \n \n rust,\n \n \n \n natural,\n \n \n \n observation,\n \n \n \n telephone,\n \n \n \n satellites,\n \n \n \n hubble space telescope,\n \n \n \n hubble,\n \n \n \n space observatory,\n \n \n \n telescope,\n \n \n \n images,\n \n \n \n moons,\n \n \n \n artificial satellites,\n \n \n \n probes,\n \n \n \n weather monitoring,\n \n \n \n communication,\n \n \n \n navigation,\n \n \n \n outer space,\n \n \n \n exploration,\n \n \n \n gravitational,\n \n \n \n geostationary,\n \n \n \n radio,\n \n \n \n tv,\n \n \n \n navigate,\n \n \n \n internet,\n \n \n \n antenna,\n \n \n \n survey,\n \n \n \n maps,\n \n \n \n studies,\n \n \n \n military,\n \n \n \n photographs,\n \n \n \n emission,\n \n \n \n sustainable,\n \n \n \n sustainable development,\n \n \n \n low-energy house,\n \n \n \n environmental protection,\n \n \n \n endangered species,\n \n \n \n Amazon,\n \n \n \n low-energy living,\n \n \n \n low energy,\n \n \n \n protect,\n \n \n \n solar power,\n \n \n \n wind power,\n \n \n \n habitat loss,\n \n \n \n extinct,\n \n \n \n threatened,\n \n \n \n soil erosion,\n \n \n \n tourism,\n \n \n \n renewable resources,\n \n \n \n nonrenewable resources,\n \n \n \n carbon emissions,\n \n \n \n food chains,\n \n \n \n producers,\n \n \n \n consumers,\n \n \n \n food pyramids,\n \n \n \n herbivores,\n \n \n \n carnivores,\n \n \n \n omnivores,\n \n \n \n inverted pyramid,\n \n \n \n force and rotation,\n \n \n \n wheelbarrow,\n \n \n \n crowbar,\n \n \n \n effort,\n \n \n \n load,\n \n \n \n turning force,\n \n \n \n effort force,\n \n \n \n load force,\n \n \n \n types of levers,\n \n \n \n simple machine,\n \n \n \n fulcrum,\n \n \n \n first-class lever,\n \n \n \n second-class lever,\n \n \n \n third-class lever,\n \n \n \n central load,\n \n \n \n central effort,\n \n \n \n central pivot,\n \n \n \n first class,\n \n \n \n second class,\n \n \n \n central,\n \n \n \n turning,\n \n \n \n roughage,\n \n \n \n repair,\n \n \n \n nutrients,\n \n \n \n balanced diet,\n \n \n \n fats,\n \n \n \n vitamins,\n \n \n \n fiber,\n \n \n \n maintenance,\n \n \n \n sucrose,\n \n \n \n scurvy,\n \n \n \n salts,\n \n \n \n displacement,\n \n \n \n displacement reactions,\n \n \n \n extraction of metals,\n \n \n \n extraction,\n \n \n \n ores,\n \n \n \n reactivity of metals,\n \n \n \n examples of displacement reactions,\n \n \n \n reactivity series,\n \n \n \n thermite reaction,\n \n \n \n thermite,\n \n \n \n reactive,\n \n \n \n diffuse,\n \n \n \n particle theory,\n \n \n \n physical changes,\n \n \n \n concentration,\n \n \n \n changes in state,\n \n \n \n room temperature,\n \n \n \n gas pressure,\n \n \n \n evaporating,\n \n \n \n compressing,\n \n \n \n evaporate,\n \n \n \n compress,\n \n \n \n concentrate,\n \n \n \n measure,\n \n \n \n moment,\n \n \n \n clockwise,\n \n \n \n moment equation,\n \n \n \n torque,\n \n \n \n measuring torque,\n \n \n \n principle of torque,\n \n \n \n principle,\n \n \n \n balancing torque,\n \n \n \n balancing,\n \n \n \n calculating torque,\n \n \n \n turning effect,\n \n \n \n allen key,\n \n \n \n calculate,\n \n \n \n counterclockwise,\n \n \n \n equal forces,\n \n \n \n opposite forces,\n \n \n \n calculating distance,\n \n \n \n clockwise torque,\n \n \n \n bronchioles,\n \n \n \n role,\n \n \n \n alveoli,\n \n \n \n mechanism,\n \n \n \n gas exchange,\n \n \n \n inhaled air,\n \n \n \n exhaled air,\n \n \n \n air sac,\n \n \n \n alveolus,\n \n \n \n breathe,\n \n \n \n elodea,\n \n \n \n starch,\n \n \n \n green plants,\n \n \n \n aquatic plants,\n \n \n \n requirements,\n \n \n \n protein,\n \n \n \n production,\n \n \n \n measurement,\n \n \n \n difference,\n \n \n \n heat and temperature,\n \n \n \n flow of energy,\n \n \n \n measuring temperature,\n \n \n \n insulators,\n \n \n \n acids,\n \n \n \n acidic foods,\n \n \n \n bases,\n \n \n \n alkaline,\n \n \n \n classifying substances,\n \n \n \n classiy,\n \n \n \n indicators,\n \n \n \n ph scale,\n \n \n \n uses of acids,\n \n \n \n uses of bases,\n \n \n \n neutralizing,\n \n \n \n corrosive,\n \n \n \n examples of acids,\n \n \n \n examples of bases,\n \n \n \n dyes,\n \n \n \n acids and bases,\n \n \n \n ear protection,\n \n \n \n decibel,\n \n \n \n tinnitus,\n \n \n \n ear,\n \n \n \n hearing process,\n \n \n \n audible frequency,\n \n \n \n audible frequency ranges,\n \n \n \n frequency ranges,\n \n \n \n audible range of humans,\n \n \n \n audible,\n \n \n \n humans,\n \n \n \n loud sounds,\n \n \n \n outer ear,\n \n \n \n middle ear,\n \n \n \n inner ear,\n \n \n \n electrical signals,\n \n \n \n auditory nerve,\n \n \n \n auditory,\n \n \n \n hertz,\n \n \n \n measuring sound,\n \n \n \n audible frequency in animals,\n \n \n \n aging,\n \n \n \n hearing mechanisms,\n \n \n \n age,\n \n \n \n ear wax,\n \n \n \n ear damage,\n \n \n \n threshhold,\n \n \n \n noise,\n \n \n \n wire,\n \n \n \n coil,\n \n \n \n electromagnet,\n \n \n \n solenoid,\n \n \n \n currrent,\n \n \n \n magnetic field,\n \n \n \n wire coil,\n \n \n \n electric bell,\n \n \n \n relay switch,\n \n \n \n magnetic forces,\n \n \n \n relay,\n \n \n \n switch,\n \n \n \n transformation,\n \n \n \n transfer of energy,\n \n \n \n radiation,\n \n \n \n electromagnetic radiation,\n \n \n \n heat waves,\n \n \n \n boiling water,\n \n \n \n convection,\n \n \n \n heat convection,\n \n \n \n electical energy,\n \n \n \n gravitational energy,\n \n \n \n transferring,\n \n \n \n currents,\n \n \n \n low resistance,\n \n \n \n high resistance,\n \n \n \n ammeter,\n \n \n \n parallel circuit,\n \n \n \n components,\n \n \n \n testing current flow,\n \n \n \n useful energy,\n \n \n \n wasted energy,\n \n \n \n energy conservation,\n \n \n \n conservation of energy,\n \n \n \n principle of conservation of energy,\n \n \n \n created,\n \n \n \n destroyed,\n \n \n \n elastic energy,\n \n \n \n input,\n \n \n \n output,\n \n \n \n form of energy,\n \n \n \n human\xc2\xa0eye,\n \n \n \n sensor,\n \n \n \n pupil,\n \n \n \n electrical\xc2\xa0signal,\n \n \n \n seeing,\n \n \n \n luminous\xc2\xa0object,\n \n \n \n eye,\n \n \n \n non-luminous\xc2\xa0object,\n \n \n \n optic\xc2\xa0nerve,\n \n \n \n path\xc2\xa0of\xc2\xa0light,\n \n \n \n sources\xc2\xa0of\xc2\xa0light,\n \n \n \n travels,\n \n \n \n shadows,\n \n \n \n eclipses,\n \n \n \n luminous,\n \n \n \n light\xc2\xa0travels,\n \n \n \n overhead\xc2\xa0projector,\n \n \n \n opaque,\n \n \n \n lunar,\n \n \n \n umbra,\n \n \n \n partial\xc2\xa0eclipse,\n \n \n \n time\xc2\xa0delay,\n \n \n \n thunder,\n \n \n \n perpendicular,\n \n \n \n axis,\n \n \n \n seasons,\n \n \n \n Northern Hemisphere,\n \n \n \n Southern Hemisphere,\n \n \n \n summer,\n \n \n \n winter,\n \n \n \n spring,\n \n \n \n Earth's tilt,\n \n \n \n angle of Earth tilt,\n \n \n \n South Pole,\n \n \n \n North Pole,\n \n \n \n Earth's surface temperature,\n \n \n \n Earth's rotation,\n \n \n \n angle of tilt,\n \n \n \n Earth's poles,\n \n \n \n day,\n \n \n \n Earth movement,\n \n \n \n movement of the Earth,\n \n \n \n Earth's movement,\n \n \n \n night,\n \n \n \n apparent movement,\n \n \n \n stars,\n \n \n \n Earth's orbit,\n \n \n \n sky,\n \n \n \n star trails,\n \n \n \n drugs,\n \n \n \n drugs and health,\n \n \n \n solvent products,\n \n \n \n alcohol,\n \n \n \n depressants,\n \n \n \n stimulants,\n \n \n \n hallucinogens,\n \n \n \n misuse of drugs,\n \n \n \n healthy,\n \n \n \n prescription drugs,\n \n \n \n prescription,\n \n \n \n hard drugs,\n \n \n \n soft drugs,\n \n \n \n reaction times,\n \n \n \n long-term effects,\n \n \n \n tranquilizers,\n \n \n \n heroin,\n \n \n \n cocaine,\n \n \n \n sensations,\n \n \n \n marijuana,\n \n \n \n cannabis,\n \n \n \n ecstasy,\n \n \n \n solvent abuse,\n \n \n \n area,\n \n \n \n building,\n \n \n \n ice,\n \n \n \n decreased pressure,\n \n \n \n decreasing pressure,\n \n \n \n foundations,\n \n \n \n foundation,\n \n \n \n broad feet,\n \n \n \n camels,\n \n \n \n surfing,\n \n \n \n snowboard,\n \n \n \n skis,\n \n \n \n boxing glove,\n \n \n \n boxing gloves,\n \n \n \n tractor,\n \n \n \n frozen lake,\n \n \n \n frozen river,\n \n \n \n pressure equation,\n \n \n \n calculating pressure,\n \n \n \n increasing pressure,\n \n \n \n pascals,\n \n \n \n pressure equation triangle\n \n \n