Convection causes large masses of rock to rise from and sink into Earth's mantel. The main heat source for this movement is 1.Earth's maritle and core.
2.Friction produced by plate motions.
3.Radiation from the sun
4.Magma in Earth's crust.

Acharreadas is a popular mexican thing where people display varying skills of horsemanship much like what events in the united states?

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

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays