1. Solar Energy

2. Solar backpack

3. Solar backpacks

4. Solar heater

5. Solar cooker

6. Archimedes

7. Comprehension Check Question 10 58-59p

8. 1.Robert Harrison went to L.A. by plane, two months ago.

9. 2. Robert Harrison went to L.A with a solar backpack.

10. 3. The solar backpack needs the battery.

11. 4. A solar heater was invented before Archimedes used solar energy.

12. 5. There was not a solar cooker in the 1700s.

13. 6. Solar devices didn’t work at night.

14. 7. When a solar heater and cooker were invented, many people bought them.

15. 8. What did Archimedes do with mirrors?

16. 9. When was the solar heater was invented?

17. 10. Why was a solar cooker not popular?