8th Grade Topics 11 & 12 Vocabulary Flashcards

Front

A model of the universe in which Earth is at the center of the revolving planets and stars.

Back

Geocentric

Front

A model of the solar system in which the Sun is at the center and the planets orbit around it.

Back

Heliocentric

Front

The movement of an object around another object.

Back

Revolution

Front

The path of an object as it revolves around another object in space.

Back

Orbit

Front

the oval shape of a planet's orbit

Back

Elliptical

Front

The spinning of a planet or star on its axis.

Back

Rotation

Front

An imaginary line that passes through Earth's center

Back

Axis

Front

The collection of eight planets and their moons in orbit around the sun, together with smaller bodies such as asteroids, meteoroids, and comets.

Back

Solar System

Front

The four planets closest to the Sun: Mercury, Venus, Earth, and Mars.

Back

Inner Planets

Front

The planets farthest from the Sun, including Jupiter, Saturn, Uranus, and Neptune.

Back

Outer Planets