Saturn's moon Titan has rain like earth, but the rain is ________, not water
Fill in the blank(s) with correct word
methane
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Which of the following statements describes the overall effect of clouds?
A. They have a net warming effect on climate. B. They have a net cooling effect on climate. C. They are the most important feature in determining climate. D. They have no net effect on climate.
Today, there are an estimated __________ multinational corporations (MNCs).
a. 100,000 b. 67,000 c. 58,000 d. 200,000 e. 170,000
Give an example from the United States of a centrifugal force and a centripetal force
What will be an ideal response?
Which of the following statements about pH is true?
A) The pH scale measures the concentration of hydrogen ions in a solution. B) A pH of 3 is alkaline, a pH of 10 is acid. C) An acid is a substance that combines with a hydrogen in solution. D) On average, the pH of the ocean is moderately acidic.