Solar System

When Earth spins, it turns around an imaginary line called a(n)

• rotation

• axis

• orbit

• ellipse

A ____ is a huge system of gas, dust, stars, and objects orbiting stars that is held together by the force of gravity.

• galaxy

• comet

• meteor

• gas giant

Which planet is an inner planet?

• Uranus

• Venus

• Saturn

• Neptune

Which planet is the solar system's largest rocky planet?

• Mars

• Earth

• Mercury

• Jupiter

Which choice best describes the parts of the Milky Way?

• Earth, its moon, the sun, and Jupiter

• Gas, dust, stars, and objects that orbit stars

• Asteroids, comets, objects that orbit stars, and the stars

• The inner planets, the outer planets, gas, and dust

Which list shows the correct order of planets from the sun?

• Mercury, Venus, Earth, Mars, Asteroid Belt, Jupiter, Saturn, Uranus, Neptune, Kuiper Belt

• Mercury, Venus, Earth, Mars, Kuiper Belt, Jupiter, Saturn, Uranus, Neptune, Asteroid Belt

• Mars, Venus, Earth, Saturn, Mercury, Pluto, Ceres, Kepler 442-B

• Just a big black hole

Which is an object in the solar system that is a frozen mass of ice and dust?

• an asteroid

• a comet

• a moon

• a planet

Brianna and Mari want to develop a model of how Earth moves in space. In their model, Brianna will represent Earth and Mari will represent the sun. Which of the following should NOT be part of Brianna and Mari's model?

• Brianna walks in a circle around Mari.

• Brianna spins in circles.

• Mari stands still.

• Mari walks in a circle around Brianna.

What do Jupiter, Saturn, Uranus, and Neptune have in common?

• They all have rocky surfaces.

• They all appear to be similar to Earth.

• They all are gaseous planets.

• They all appear to be made of rock and ice.

Why does the sun seem to change position in the sky?

• Earth's rotation

• Earth's orbit

• The sun's rotation

• The sun's orbit