| A | B |
|---|
| chemical bonds | The forces that join atoms to each other |
| hydroelectric energy | Electricity generated from the force of moving water |
| tidal energy | A form of hydroelectric energy that produces electricity from the rising and falling of tides |
| biomas | Organic matter such as wood that is living or was recently alive |
| nuclear energy | The energy released when the nucleus of an atom is split apart |
| geothermal energy | Heat from inside the Earth |
| solar energy | The energy of sunlight |
| fusion energy | The energy released when the nuclei of two atoms are forced together to form a large nucleus |
| chemical bonds | The forces that join atoms to each other |
| biome | A large-scale ecosystem |
