Discuss the information that various sedimentary structures can provide about depositional
environments. Give specific examples. What will be an ideal response?
Examples may include mud cracks that indicate a period of flooding followed by desiccation.
Thick cross-beds in a sandstone indicate wind-driven (aeolian) processes in a desert
environment. Graded bedding commonly indicates a turbidity current in a deep marine
environment.
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Geologists measure earthquakes on the moment magnitude scale. This scale measures
A) the amount that the ground shakes during an earthquake. B) the Richter magnitude of an earthquake. C) the depth of the earthquake focus. D) the energy released by an earthquake.
Increasing atmospheric carbon dioxide causes Earth's climate to warm by strengthening ____
A) primary productivity B) the greenhouse effect C) ocean currents D) incoming sunlight
A region of the United States with a high concentration of karst lakes is located in ____
a. Hawaii b. Nevada c. Florida d. North Dakota
Humpback whales are members of which of the following orders?
A) Carnivora B) Cetacea C) Chiroptera D) Rhenanida E) Sirenia