Science and Technology, p. 34-35

2. Bakelite and PVC were some of the first invented and sold ___
4. Type of physics that suggested energy does not travel in continuous waves but is made up of tiny particles by German physicist Max Planck
5. This cleaner power is generated by the flow of water from reservoirs
10. 20th century source of ___ included petroleum, electricity, and oil
11. German-born scientist that published the Relativity Theory in 1905
14. Clean energy developed in the 1970s that unfortunately had a high installation cost and low power output
16. Solar panels work because the Sun causes __ movement between two silicon layers causing electricity.
17. Einstein believed that the only fixed constant in the universe was the speed of ____
18. atomic bomb dropped on Nagasaki Japan in 1945
21. Excessive amounts of coal and oil burning to generate power led to widespread ___

1. Streets became safer because of ___ lighting
3. American military research project to produce atomic bombs
6. Denmark scientist that showed new models of atoms
7. City in Ukraine that had a meltdown disaster that spread over a large area of Northern Europe in 1986
8. Traditional heat source included wood or ___
9. Devices such as vacuum cleaners, refrigerators, and washing machines helped people save ___.
12. Man-Made materials such as rayon and ___ were used in electrical appliances and household goods
13. Device that enabled photographic record of fast moving cosmic particles
15. New Zealand scientist that modeled atoms having a small hard core nucleus
19. Consequence of radioactive material released into the atmosphere after walls of a reactor melt
20. Tiny sub-atomic particles