09 8r Astronomy Flashcard Solar System, Stars, Comets, and Asteroids

Front

What determines the color of a star?

Back

Temperature

Front

What is one of the main differences between the outer and inner planets?

Back

The outer planets are gas planets.

Front

Order from smallest to largest: Sun, Milky Way, solar system, universe.

Back

Sun, solar system, Milky Way, universe

Front

The sun's energy comes from nuclear __________.

Back

fusion

Front

Which planet is sometimes called the red planet because the surface is made of iron-rich oxides?

Back

Mars

Front

Why is Susan's solar system model, with evenly spaced planets from the sun to Neptune, incorrect?

Back

The planets are not spaced out evenly.

Front

What force keeps the planets from flying out of the solar system?

Back

gravity

Front

Which stars are the hottest?

Back

Blue-white

Front

Of the stars pictured, which is the coolest star? Options: Blue-white supergiant, Our sun, Red giant

Back

Red giant

Front

Earth's primary source of energy comes from __________.

Back

the sun