In what way are mars and venus similar to earth?
a. a single moon orbits both mars and venus.
b. mars and venus are about the same size as earth.
c. all three planets are the same distance from the sun.
d. all three planets have the same amount of water on their surfaces.

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.