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.
A
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The fact that one side of the Moon always faces Earth is evidence that while revolving about the Earth, it
A. rotates about its axis. B. does not rotate about its axis.
The tropical monsoon climate is different from the tropical rainforest because it has:
a. a short dry season. b. its coolest month averaging above 18?C (64.4?F). c. forest cover as natural vegetation. d. climate regions in Africa, Asia, and South America.
Latitude measurement ____ as one moves away from the equator
a. increases b. decreases c. does not vary d. none of these
Biomagnification
What will be an ideal response?