The amount of water on Earth A: decreases slightly over time and does not change form.
B: remains the same and does not change form.
C: increases slightly over time, but changes forms.
D: remains the same, just in different forms.

Which of the following best describes the economy of africa?

What is the theme of "the story of the fisherman"?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.