Using the principle of Uniformitarianism, which makes the most sense?
A) A crater from 4 million years ago is similar to one from an impact last year; the ancient crater probably wasn't caused by an impact however.
B) A crater from 4 million years ago is similar to one from an impact last year; the ancient crater was probably also caused by an impact.
C) A crater from 4 million years ago is similar to one from an impact last year; the ancient crater must not be as ancient as scientists thought.
D) A crater from 4 million years ago is similar to one from an impact last year; the new crater must be a lot older than scientists thought.
Question 2
Why is heat the most important form of energy transfer for geologic processes?
A) Heat from the Sun fuels Earth-surface processes, such as wind, ocean waves, and the evaporation and precipitation of water.
B) Heat cancels out the cold, allowing geologic processes to occur.
C) Heat makes rock melt so the plates can move.
D) Heat from the earth warms human's houses during the winter.
The grey side-gilled sea slug Pleurobranchaea maculata. The discovery of tetrodotoxin in this slug i
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