Which is generated by movements of tectonic plates?
a. seismic waves
b. ocean currents
c. volcanoes
d. earth's magnetic field

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called

Which describes italy’s mediterranean climate? a. moist in the summer and dry in the winter b. mild and wet all year round c. cool in the summer and warm in the winter d. hot in the summer and mild in the winter

What effect has the drug trade had on some governments in middle and south america? a. it has funded political instability. b. many nations have created democratic governments. c. many governments have allowed the drug trade to fund local programs. d. it has funded political stability.