| A | B |
|---|
| clorophyll | a green pigment found in the chloroplasts of plants,algea, and some compounds |
| chloroplast | a structure in the cells of plants and some other organisms that captures energy from light and uses it to produce food |
| elastic potential energy | the energy of stretched or compressed objects |
| energy | the ability to do work or cause change |
| fossil fuel | an energy-rich substance, such as coal,oil, or natural gas, formed from the remains of organisms; fossil fuels are burned to release their chemical energy |
| fuel | a material that releases energy when it burns |
| gravitational potential energy | potential energy that depends on the height of an object |
| energy conversion | the process of changing one form of energy into another |
| kinetic energy | energy that an object has due to its motion |
| law of conservation of energy | the rule that energy cannot be created or destroyed |
| photosynthesis | the process by which plants and some other organisms capture light energy and use it to make food from carbon dioxide and water |
| pigment | a light colored compound that absorbs light; pigments are opaque and are used to color other materials |
| potential energy | energy that is stored and available to be used later |
| respiration | the process by which cells break down simple food molecules to release the energy they contain |
