Science unit test pre vocabulary

Astronomical Unit (au)

A measurement of distance used in space. One au is the distance between the sun and the earth.

Earth's axis

An invisible line running from Earths north to south poled in which earth rotates (causing day and night)

Earth's tilt

23.5° angle which causes seasonal changes on Earth. During the year, we change from titling towards and away from the sun.

Galaxy

A collection of stars held together by gravity.

Gravity

A universal attractive force effect by mass, and distance.

Lunar Eclipse

Phenomenon occurs during the full moon phase when earth cast a shadow on the moon.

Moon Phases

Changing views of the moon as it orbits Earth due to the amount of sunlight reflected.

Orbit

When an object revolves another object in a circular path.

Orbital Plane

Changing Angle of orbit.

Solar Eclipse

Phenomenon occurs when the new moon cast a shadow on part of Earth.

Solar System

A star and all of the objects orbiting this sun- planets, moons, asteroids, comets.