How are matter and nutrients cycled back into the ecosystem from which they came?

How do the relationship between the earth and the sun affect

What's the form of government Castro brought to Cuba

Ocean trenches are most often formed when A) two continental plates slide past each other. B) an oceanic plate goes under a continental plate. C) two oceanic plates grind past each other along transform faults.

Which of the following is the least-polluting, nonrenewable energy source? 1. oil. 2. natural gas. 3. biomass. 4. coal.

What is the largest Venezuelan river?

Which of the following terms describes a family structure headed by a woman?

Which of these is a renewable resource? a. coal b. cotton c. copper d. petroleum

What are the classifications for the six major land areas on earth?

Which of the following European countries is one of the top three leading exporters in the world? A) United Kingdom B) Germany C) Spain D) France

Fault lines are: the crust of the lithosphere that has fractured along plate boundaries and ridges the crust of the athenosphere that has fractured along plate boundaries and ridges the crust of the biosphere that has fractured along plate