| A | B |
| Cryosphere | the part of the Earth made up of all the frozen water on Earth. |
| Biosphere | made up of living things and the areas of Earth where they are found. |
| Geosphere | mostly solid, rocky part of the Earth |
| Hydrosphere | the part of the Earth that is liquid water. |
| Atmosphere | a mixture of mostly invisible gases that surrounds Earth. |
| Ozone Layer | an area in the stratosphere, 15 km to 40 km above Earth’s surface, where ozone is highly concentrated. |
| Greenhouse Effect | the process by which gases in the atmosphere, such as water vapor and carbon dioxide, absorb and give off infrared radiation. |
| Thermal Energy | the total kinetic energy of particles |
| Temperature | a measure of the average kinetic energy of particles |
| Heat | the energy that is transferred between objects that are at different temperatures. |
| Specific Heat Capacity | the amount of heat required to change an substance's temperature by a given amount. |
| Conduction | the transfer of energy from one object to another through direct contact. |
| Convection | the transfer of energy due to the movement of matter in cycles called currents. |
| Radiation | the transfer of energy as electromagnetic waves |