The theory of plate tectonics scientists explain
a. how ocean currents move over earth’s surface.
b. why hurricanes occur.
c. how earthquakes and volcanic eruptions occur.
d. why earth’s mantle is more dense than its crust

What is the "great pacific garbage patch"? (a) a large area of marine debris concentrated by rotating ocean currents (b) a large area around the pacific rim where debris collects from natural disasters such as tsunamis (c) an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability (d) a large trash dump located in hawaii

What causes heat transfer in fluids

Which of the following countries was not an ally to the u.s.s.r. during the cold war? west germany poland romania cuba