Chapter 28 Our Solar System

Which is the second closest planet to the sun?

• Earth

• Saturn

• Venus

• Mercury

Which planet is third from the sun?

• Mars

• Pluto

• Venus

• Earth

Which planet is fifth from the sun?

• Saturn

• Jupiter

• Mars

• Earth

Which is the sixth planet from the sun?

• Earth

• Uranus

• Saturn

• Neptune

Which planet is farthest from the sun?

• Neptune

• Pluto

• Earth

• Uranus

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Which planet has iron in the soil that gives it a red color?

• Earth

• Uranus

• Mars

• Saturn

Planets that have a rocky or solid surface are called:

• Terrestrial Planets

• Gas Giants

How would the planets move if the Sun disappeared?

• The planet would stop moving because gravity is no longer affecting it.

• The planet would move for a little while longer, but then stop.

• The planet would move in a straight line in the direction it had been traveling, because of its inertia.

• The planet would stop moving, but then start moving again because it would attach to another celestial object or planet.

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How do scientists believe gravity influenced the formation of the planets in our solar system?

• A large cloud of gas and dust ignited into a planet.

• Gravity pulled the planets out of the Sun.

• A large explosion created the planets.

• Large pieces of debris clumped together to form planets.

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The orbital speeds of planets closer to the Sun will be faster than planets farther away because.....

• The gravity decreases as the distance between the objects increase.

• The gravity increases as the distance between the objects decrease.

• The gravity increases as the mass of the object increases.

• The gravity between the objects decrease as the objects warm up.

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