a small, rocky object that orbits the sun; most asteroids are located in a band between the orbits of Mars and Jupiter

the scientific study of the origin history, and structure of Earth and the processes that shape Earth

the thin and solid outermost layer of Earth above the mantle

all the bodies of fresh water, salt water, ice, and snow that are found above the ground

the measure of the force with which air molecules push on a surface

the distance north or south from the equator; expressed in degrees

the difference in levels of ocean water at high tide and low tide

the net flow of energy into and out of a system

the different appearances of the moon from Earth throughout the month

in the orbit of a planet or other body in the solar system, the point that is closest to the sun