Earth's geochemical cycles remove and add materials, such as water and rock. the three main, interconnected geochemical cycles of earth are a) water, rock, and tectonic cycles b) water, rock, and carbon cycles c) water, tectonic, and nitrogen cycles d) rock, tectonic, and volcanic cycles

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