Exit which of the following is not a source of earth's internal heat?
a. mantle convection
b. radioactive substances
c. gravitational contraction
d. past bombardment by asteroids

Are divergent boundaries responsible for tsunamis?

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion

In recent times, what parts of texas are most likely to gain to representatives based on redistricting in recent years