| alternative | A choice between two or more things. |
| component | A part of something. |
| conservation | Keeping natural resources in good, working condition. |
| convert | Changing from one thing to another. |
| energy resource | A natural resource that can be converted into energy. |
| environment | The surroundings where plants and animals live. |
| fossil fuels | Fuels created from remains of dead organisms. |
| generate | To cause or create. |
| geothermal energy | Heat energy from within the Earth. |
| hydroelectric energy | Energy from flowing water. |
| material resource | A natural resources that can be converted into usable materials. |
| natural resource | Materials and energy source in nature that is useful or necessary. |
| nonrenewable resource | A natural resource that can only be replaced over long periods of time. |
| nuclear energy | this is the energy produced when an atom splits apart (fission) or when two atoms join to form one atom (fusion) |
| pollution | Harmful things in an environment. |
| recycling | Using old materials to make new products. |
| renewable resource | A natural resources that can be replaced by nature in a short time. |
| solar energy | Energy from the sun. |
| wind energy | Energy from the wind. |
Drag corresponding items onto each other to make them disappear.
Start Game