Most of the energy in the United States comes from:
fossil fuels
hydroelectric plants
solar power
nuclear power

Which process is involved in growing crops? irrigation transportation recreation condensation

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16