Solar Energy

2. when skin darkens from the sun
3. study the atmosphere to predict weather earth material is a nonliving substance that makes up or comes from the earth.
8. anything that takes up space and has mass
10. pattern of colors that make up the Sun's light
12. invisible water in its gas state
14. is a tool to measure temperature
16. material, such as water, that can absorb a large amount of heat for its volume and release the energy slowly.
17. course or line along which something moves, lies, or points
18. energy particles given off by the Sun

1. dark area created by an object that stops light
4. change of energy from one form to another (such as light to heat), or the movement of energy from one object to another (such as heat moving from air to soil or water).
5. difference between a starting time and an ending time
6. position or arrangement in relation to another position or location
7. is energy from the Sun
9. instrument used to determine direction
11. turn into gas
13. the flow of warm air up and cool air down
15. star around which Earth and other planets revolve