At which of the following wavelengths does the Earth emit radiation of greatest intensity?
A. visible wavelengths
B. ultraviolet wavelengths
C. radio wavelengths
D. infrared wavelengths
Answer: D
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The percentage of the Earth's water that is fresh water that is not frozen is:
a. 5%. b. 3%. c. 1%. d. 0.65%. e. 0.01%.
Precipitation measured by weather radar
A) is based on the inability of falling droplets, ice crystals and hailstones to scatter radiation B) is based on the emission of radiation by falling droplets, ice crystals and hailstones C) is based on the absorption of radiation by falling droplets, ice crystals and hailstones D) is based on the scattering of radiation by falling droplets, ice crystals and hailstones
The most accurate terms describing the trend over the past 50 years for human use of natural resources are ________
A) steady state, no change B) rapidly increasing, moving from unsustainable to sustainable C) from unsustainable to sustainable D) increasing and unsustainable E) decreasing and sustainable
Relative humidity gives a measurement of the amount of water in the air, and is usually measured in grams per cubic meter
Indicate whether the statement is true or false