Unit 1 Study Guide

What do you call a large piece of ice in space?

• Asteroid

• Comet

• Meteor

• Meteorite

What do you call a large rock in space?

• Asteroid

• Comet

• Meteor

• Meteorite

What do you call a rock falling to Earth from outer space?

• Asteroid

• Comet

• Meteor

• Meteorite

What force causes planets to orbit the sun?

• Gravity

• Magnetism

• Inertia

• Light

The Earth rotates _____.

• On its axis

• Around the sun

• In an ellipse

• Around the moon

The Earth revolves _____.

• On its axis

• Around the sun

• Around the moon

• Once a day

The sun, together with all the planets, comets, and asteroids around it, make up the _____.

• Solar System

• Milky Way

• Orion Arm

• Universe

What theory says that the Earth orbits the sun?

• Geocentric theory

• Heliocentric theory

• Big bang theory

• Theory of gravity

What theory says the Earth is the middle of the solar system?

• Heliocentric theory

• Geocentric theory

• Big bang theory

• Theory of gravity

What theory describes the origin of the universe?

• Heliocentric theory

• Geocentric theory

• Big bang theory

• Theory of gravity