2. Hydropower uses energy from water flowing by building dams to store water and then releasing this water
from a height. Which type of energy would this be? How would you design the dams to get the most energy?
Explain.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

What practical value did astronomy offer to ancient civilizations?