Iron rich minerals in rock pointed in one direction and then switched to the exact opposite direction to support what idea a) being underwater makes the rocks respond to magnetic fields b) best magnetic field stoped working entirely c) magnetic field goes through pole reverses d) the rocks for being turned around

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

Eutrophication caused by human nutrient pollution.

Differentiate renewable and nonrenewable resources