Science 101 Solar System National Geographic

The moon is a natural  ______ of Earth.

• comet
• axis
• satellite
• space probe

Earth and the other planets closest to the Sun are made mostly of _______

• gas
• metal
• water
• rock

Earth's ________ on its axis causes day and night.

• rotation
• revolution
• phase
• comet

The __________ has planets, moons, comets, and asteroids.

• solar system
• earth
• rotation
• United States

One of the main differences between the outer and inner planets is __________.

• The inner planets all have water

• the inner planets are much bigger than the outer planets

• the outer planets are gas giants

• the outer planets have rings, and the inner planets don't

Which outer planets have rings?

• Just Saturn
• Saturn and Jupiter
• Jupiter, Neptune, and Saturn
• all 4 of them

Which is the largest object in our solar system?

• Sun
• Jupiter
• Earth
• Pluto

A small object that appears as a streak of light as it enters earth's atmosphere.

• Asteroid
• Comet
• Moon
• Meteor

The GAS GIANTS or Outer planets are:

• Mercury, Earth, Jupiter, Saturn
• Saturn, Neptune, Pluto, Mars
• Saturn, Jupiter, Uranus, Neptune
• Earth, Mars, Saturn, Neptune

The inner planets are:

• Jupiter, Earth, Mars, Mercury
• Saturn, Uranus, Mars, Earth
• Earth, Pluto, Neptune, Mars
• Mercury, Venus, Earth, Mars