Which of the following defines contact nucleation?
A. the joining of many nuclei to form an ice nucleus
B. the freezing of supercooled droplets by contact with a nucleus
C. the sticking together of ice crystals to make a snowflake
D. the freezing of supercooled droplets when they make contact with a supercooled surface
Answer: B
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Plate "Tectonics", from the Greek word "Tekton", means that:
a. plate movements "build" regional geologic features b. plate tectonics is responsible for most of the features of our planet c. plate boundaries can only construct, but not destroy, geologic features d. both a and b
Denis Hayes is known for his role in the development of ____.
A. the Environmental Defense Fund B. the Environmental Protection Agency C. the Clean Water Act D. the first Earth Day E. Superfund legislation
Convergent boundaries, due to their geometry, are the sites of the largest earthquakes on Earth.
Answer the following statement true (T) or false (F)
How does vegetation help to stabilize slopes?
A. It takes up water. B. It decreases friction. C. It increases infiltration. D. It decreases infiltration.