The Solar System

There is one star in our solar system.

• True
• False

What is the difference between the inner planets and the outer planets?

• The outer planets are smaller than the inner planets 
• The inner planets are smaller than the outer planets
• The outer planets have more rocks than the inner planets
• the inner planets are heavier than  the outer planets

The gas giants are different from the terrestrial planets because they

• have smaller atmospheres

• are less dense

• do not have a solid structure

• are more colorful

The inner planets are called terrestrial planets because they are composed of

• water
• gas
• frozen surfaces
• rocks

The biggest factor that makes life possible on Earth is

• oxygen

• water

• greenhouse effect

• gravity

Which planet has very obvious and prominent rings?

• Jupiter

• Saturn

• Uranus

• Neptune

Which planet is the hottest planet because of its clouds?

• Venus
• Earth
• Mars
• Pluto

What celestial body is made of ice and cosmic dust?

• Meteor
• Meteoroid
• Asteroid
• Comet

Who stated the earth was the center of the solar system?

• Ptolemy
• Copernicus
• Kepler
• Galileo

Who stated the sun was the center of the solar system?

• Ptolemy
• Copernicus
• Kepler
• Galileo