A small amount of water can increase the shear strength of a material. True b. False 10. Subsidence, such as that occurring in Mexico City, is caused by excessive pumping of groundwater from shallow aquifers. True b. False 28 - 32. A type of coral reef that surrounds a shallow lagoon but is not associated with an existing landmass is a.
Turbidity currents bring sediments down the continental shelf.
The main drawback with hydroelectric energy is that a. it cannot be transported from one location to another b. The trapping of heat by the atmosphere is called a. La Nina 48. Ice core data and historic records indicate that the Earth has experienced rapid climate changes in the past. True b. False 50.