During the last glaciation, a large tongue of glacial ice occupied Lake Michigan for thousands of years. How, several thousand years after the retreat of the ice, an emergent coastline is developing along part of the lake
What geologic process is creating an emergent coastline in Lake Michigan?
A) Lake levels are falling.
B) Rebound of a depressed crust.
C) Subsidence of the land surface around the lake.
D) Accumulation of dunes on the beach.
Answer: B
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List three processes by which felsic and intermediate igneous rocks can be formed from more mafic
magmas. What will be an ideal response?
The domestication of plants and animals allowed humans to alter ecosystems for their benefits. Which of the following is an example of a human benefit that resulted from ecosystem change?
A) Crop production increased and more people had food to eat. B) Crop production decreased as natural habitats were replaced. C) Grasslands were destroyed and predator insects were destroyed. D) Grasslands were destroyed and replaced with forests. E) Crop production increased as a result of more plants competing for the same land space.
Which connections with the rest of the world will prove most important for Central Asia in the near future—those based on cultural features, economic ties, or geopolitical connections?
What will be an ideal response?
The New Madrid earthquakes are apparently related to an old buried ________.
A. rift zone B. transform fault C. oil pipeline D. subduction zone E. hazardous waste dump