Which of the following terms refers to the density of water vapour in a given parcel of air?
A. mixing ratio
B. specific humidity
C. absolute humidity
D. relative humidity
Answer: C
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Over the past 100 million years of Earth history, it is known that the magnetic poles have reversed themseves ______ times.
a - 0 b - 2 c - many d - 25
Construct a topographic profile of the map below along line AB. Draw your profile in the graph provided.
Which animal is a suspension feeder?
a. fish b. sea stars c. sponges d. lobsters e. sea urchin
An astronomer tells you that he has discovered a new planet that he calls Planet X. All he knows about Planet X so far is that it has a very dense atmosphere with a temperature approximately 5 times warmer than that of Earth
What hypothesis can you reasonably make regarding the atmosphere of Planet X? A) The atmosphere of Planet X has a higher concentration of greenhouse gases than Earth's does. B) Planet X cannot contain water in any form. C) The nitrogen cycle does not operate on Planet X in the same way it does on Earth. D) The atmosphere of Planet X must not contain any oxygen, so people couldn't live there.