Why is air never completely dry?
A) Water vapor makes up as much as 4% of the atmosphere
B) Clouds and fog are actually liquid droplets of water
C) Water's very presence in the atmosphere accounts for dew, rain, and snow
D) All of these choices
D
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How does the presence of silica affect the temperature and viscosity of magma?
What will be an ideal response?
Which of the following materials has high porosity and high permeability?
A. compacted clay B. unfractured granite C. well-sorted gravel D. uncompacted clay E. poorly sorted sand, silt, and clay
To predict the approximate energy release of either a fission or a fusion reaction, explain how a physicist uses a table of nuclear masses and the equation E = mc2
A) find the change in mass and divide by the speed of light squared B) find the change in mass and multiply by the speed of light squared C) find the change in mass, square it, and multiply by the speed of light D) take the square root of the change in mass and multiply by the speed of light
The most costly average annual weather event is:
A) tornadoes. B) hurricanes. C) extreme hot or cold episodes. D) floods.