Which of the following are NOT sources of freshwater? a. Rivers
b. Lakes
c. Wetlands
d. Ocean

What causes the cycle of seasons on earth? the tilt of earth’s axis the shape of earth’s orbit the direction of earth’s orbit the distance between earth and the sun

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

If scientists only detect p waves in a certain layer of earths interior what does that tell us?