Which early heat source describes how the center of the Earth squeezed together to raise the internal temperature and is still a cause of internal heat today? Gravitational contraction
Bombardment by asteroids
Radioactivity
none of theses

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

Canada plays an important role in the global community in all of the following ways except by a. acting as a superpower with influence over europe and asia. b. promoting arms control and disarmament. c. working with the commonwealth of nations to promote trade. d. promoting trade with japan and other asian countries.

Audrey planned to move from iowa to arizona. en route, she was offered a job in colorado, which she accepted. she now lives in denver, colorado, and works for an athletic apparel design company.