Across
- 1. Go____ is a saying to save energy and protect the earth
- 3. A_____ barrel is used to collect water
- 5. ______materials retain or store heat created by sunlight
- 7. _____is also known as passive solar design
- 10. A_____solar home collects the sun's heat
Down
- 2. ______is a type of product that helps save energy
- 4. A_____ panel is used to store the sun's energy
- 6. _____of a green home gains heat
- 8. A____ is a major escape route for heat
- 9. Most energy is used for______