2-S6E1

Front

What is a planet having a rocky surface like Earth’s, also called a terrestrial planet?

Back

Rocky planet

Front

What are the four planets closest to the Sun, including Mercury, Venus, Earth, and Mars?

Back

Inner planet

Front

What is a large planet composed mainly of gas?

Back

Gas giant

Front

What is the term for a star and the objects that orbit it, including asteroids, comets, dwarf planets, and planetoids?

Back

Solar system

Front

What shape describes the orbits of all planets, which are slightly elliptical and appear circular?

Back

Ellipse

Front

What is the term for the gravitational pull that keeps planets in orbit around the Sun?

Back

Gravity

Front

What is the name of the belt that separates the inner planets from the outer planets?

Back

Asteroid belt

Front

What are the planets that are not primarily composed of gas and have solid surfaces?

Back

Rocky planets

Front

What is the term for the planets that are farthest from the Sun and are mostly gas?

Back

Outer planets

Front

What is the average distance from the Earth to the Sun, approximately 93 million miles?

Back

Astronomical Unit (AU)