The solar system

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

One full orbit of an object around another object is called a ________.

• axis
• rotation
• revolution
• satellite

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

Which is the largest object in our solar system?

• Sun
• Jupiter
• Earth
• Pluto

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

The four terrestrial planets all have

• Rocky surfaces
• Hot temperatures
• Deep atmospheres
• Large size

Which planet is the hottest planet?

• Mercury
• Mars
• Venus
• Saturn