Which statement about hydroelectric power is true? It disrupts one of Earth's never-ending cycles.
It uses water's potential energy to produce electricity.
It uses civilization's earliest energy resource.
It uses a safe, renewable resource.

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Which answer lists the fundamental forces in order from strongest to weakest

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.