| A | B |
|---|
| stored energy | potential energy |
| energy in the form of motion | kinetic energy |
| general term for interaction of electric charges | electricity |
| a property of some materials in which the force is repulsive | magnetism |
| electric current that flows in one direction | direct current |
| unit of measurement for electric current | amps |
| unit of electric energy | kilowatt/hour |
| smallest particle into which an element can be divided and still have properties | atoms |
| negatively charged particles | electrons |
| atomic particle with neutral charge, in nucleus | neutron |
| atomic particle with postitive charge, in nucleus | proton |
| building block of matter, made of one kind of atom | element |
| matter made of two or more elements, chemically bonded | compounds |
| combination of two ore more substances, not combined chemically, separated physical means | mixtures |
| chemical process, plants use light energy to make sugar from water and carbon dioxide | photosynthesis |
| a chemical reaction through an acid or base | neutralization |
| process in cells, oxygen is chemically combined wiht food molecules and energy is realeased | cellular respiration |
| make more individuals of the same species from a parent organism | reproduction |
| living things | organisms |
| organism that makes its own food | producer |
| an organism that feeds on organims | consumer |
| several overlapping food chains | food webs |
| path of food energy from sun to producer to consumer | food chain |
| the sun, its planets, and other objects in orbit around the sun and planets | solar system |
| piece of rock form space enters Earth's atmosphere and burns creating streak of bright light | meteors |
| solar system object made of ice, which follows a long, narrow orbit around the sun | comets |
| force of attraction between any two objects | gravity |
| one orbit of an object in space around another object in space | revolution |
| spinning of planet, moon, sun, or other object on its axis | rotation |
| natural resources that cannot be replaced once used | nonrenewable resources |
| natural resources that can be replaced by nature | renewable resources |
| the wise use of protection of natural resources | conservation |
