What is the main difference between a longitudinal wave and a transverse wave?
a. a longitudinal wave travels faster than a transverse wave.
b. a transverse wave always has a larger amplitude than a longitudinal wave.
c. the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.
d. the frequency is directly proportional to wavelength in a longitudinal wave but inversely proportional in a transverse wave.

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.