Astronomy Part 2 Test Study Guide

The name for the Sun and all the objects that orbit it is:

• Solar System

• Galaxy

• Universe

• Milky Way

A planet is different from a star because:

• a planet orbits a star and does not produce its own light, while a star produces its own light through nuclear fusion.

• a planet produces its own light through nuclear fusion, while a star orbits a planet and does not produce its own light.

• a planet is larger than a star and produces its own light, while a star is smaller and orbits a planet.

• a planet is made of gas and dust, while a star is made of solid rock.

The path an object takes as it moves around another object in space is called a(n):

• orbit

• trajectory

• course

• route

The force that keeps planets in orbit around the Sun is:

• Electromagnetic force

• Gravitational force

• Nuclear force

• Frictional force

Which planet is known for supporting life?

• Mars

• Venus

• Earth

• Jupiter

The small, rocky objects that orbit the Sun between Mars and Jupiter are called:

• Asteroids

• Comets

• Meteors

• Planets

The primary source of light and heat in our solar system is:

• The Moon

• Mars

• The Sun

• Jupiter

The difference between rotation and revolution is:

• Rotation is the spinning of an object around its axis, while revolution is the movement of an object around another object.

• Rotation is the movement of an object around another object, while revolution is the spinning of an object around its axis.

• Rotation and revolution are the same, both involving spinning around an axis.

• Rotation involves changing position, while revolution involves changing shape.

What happens when a planet spins on its axis?

• It creates day and night cycles.

• It causes the planet to move closer to the sun.

• It results in the planet changing its orbit.

• It makes the planet stop spinning.

A large sphere of gas that produces its own light and heat is called a:

• planet

• star

• moon

• comet