- False: Edison invented the light bulb.
2. True
3. False: glass can be recycled an unlimited number of times
4. True
5. True: the average family uses 70/80% of its energy to heat the house
6. False: water boils at 100 degrees Celsius
7. False: we would need 4 planet earths if everyone lived like people in the USA
8. True
9. True
10. False: the panda is used as the WWF symbol