8th Grade Unit #6 Astronomy and Solar System Concept Flash Cards

Front

convection zone

Back

where hot gas moves up toward the surface and cooler gas moves deeper into the interior

Front

solar system

Back

sun, planets, and all the other objects that revolve around the sun

Front

planet

Back

An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.

Front

orbit

Back

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

Front

moon

Back

A natural satellite that revolves around a planet.

Front

Sun

Back

A typical star that is the source of light and heat for the planets in the solar system.

Front

gravity

Back

A force of attraction between objects that is due to their masses.

Front

geocentric

Back

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

Front

heliocentric

Back

Based on the belief that the sun is the center of the universe

Front

sunspot

Back

A dark area of gas on the sun's surface that is cooler than surrounding gases.