Our Solar System

Why is the sun considered the center of the solar system?

• it is closer to Earth than other stars

• The sun produces light and energy.

• The sun is the largest object that can be seen.

• Everything in the solar system revolves around the sun.

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Ganymede is a moon of Jupiter. It is larger than Mercury and has a metallic core similar to Earth's core. Which of these statements best explains why Ganymede is classified as a moon rather than a planet?

• It is too large to be called a planet.

• It orbits Jupiter instead of the sun.

• Its properties are different than Jupiter's

• It is farther from the sun than Mercury.

The only planet that supports life.

• Pluto

• Mars

• Earth

• Mercury

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How is Earth different from all the other planets in our solar system?

• It is the only planet with its own moon.

• It has storms in the atmosphere.

• It has liquid water that allows plants and animals to live.

• It is close enough to the sun to get heat energy.

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The spinning of an object on its axis is called______

• orbit
• rotation
• revolution
• tide

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

• gas
• metal
• water
• rock

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A force of attraction between any two objects is called _____________.

• static electricity 
• rotation
• gravity
• orbit

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How long does it take Earth to complete one revolution around the Sun?

• 24 hours
• one week
• one month
• one year

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Earth completes one full ___________ on its axis every 24 hours.

• rotation
• revolution
• resolution
• reservation 

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__________ is the largest planet in the Solar System.

• Mercury

• Venus

• Jupiter

• Earth

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