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Science 8 Chapter 10

The Sun-Earth-Moon System

The path taken by an object revolving around another. Orbit
A round, three-dimensional object whose surface is the same distance from its center at all points. Sphere
Imaginary vertical line that cuts through the center of Earth and around which Earth spins. Axis
Spinning of Earth on its imaginary axis, which takes about 24 hours to complete and causes day and night to occur. Rotation
Earth's yearlong elliptical orbit around the Sun. Revolution
Elongated, closed curve that describes Earth's yearlong orbit around the Sun. Ellipse
Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator. Solstice
Twice-yearly time-each spring and fall-when the Sun is directly over the equator and the number of daylight and nighttime hours are equal worldwide. Equinox
Change in appearance of the Moon as viewed from the Earth, due to the relative positions of the Moon, Earth, and Sun. Moon phase
Moon phase that occurs when the Moon is between Earth and the Sun,at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth. New moon
Describes phases following a new moon, as more of the Moon's lighted side becomes visible. Waxing
Phase that occurs when all of the Moon's surface facing Earth reflects light. Full moon
Describes phases that occur after a full moon, as the visible lighted side of the Moon grows smaller. Waning
Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth. Solar eclipse
Occurs when Earth's shadow falls on the Moon. Lunar eclipse
Dark-colored, relatively flat regions of the Moon formed when ancient lava reached the surface and filled craters on the Moon's surface. Maria
A hollow left on the surface of the Moon caused by an object striking its surface. Impact basin
Created by: rwaters