Pearson Astronomy Chapter 7 Review

The reasons scientists use scale models of the solar system is... (Check all that are correct.)

• To understand exactly where all planets and suns and stars are positioned.

• To understand how moons orbit planets and how planets orbit suns.

• To better torture eight grade science students.

• To prepare for space travel so we know how far away a planet is and what obstacles are in our way.

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How much larger is the Sun than the Earth?

• The Sun is smaller than the Earth.

• The Sun is approximately 110 times bigger than the Earth.

• They are the same size.

• The Sun is approximately 20 times bigger than Earth.

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The Moon gets its light from the

• Earth.

• Stars.

• Sun.

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Using the picture, why does Earth's Moon have different phases?

• Earth's moon follows the Sun around the Earth.

• Earth's moon moves around the Earth.

• Earth's moon moves around the Sun.

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Based on the image, what would an observer at location A see?

• A total lunar eclipse.

• A partial lunar eclipse.

• A total solar eclipse.

• A partial solar eclipse.

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The image shows a total lunar eclipse. What image shows the corresponding positions of the Earth, Moon and Sun?

• 
• 
• 
• 

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Based on the image, what would an observer on the nighttime side of Earth observe?

• A total lunar eclipse

• A partial lunar eclipse

• A partial solar eclipse

• A Full Moon

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The force of gravity on the surface of Mars is much less than on Earth. A rock has a weight of 100 newtons on Earth. What do you know about the weight of the rock on Mars?

• The rock will weigh exactly 100 newtons.

• The rock will weigh more than 100 newtons.

• The rock will weigh less than 100 newtons.

• There is not enough information to know if the rock weighs the same, more, or less on Mercury.

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A chair has a mass of 10 kilograms on Earth. What is the mass of the chair on Mars?

• 10 kilograms

• more than 10 kilograms

• less than 10 kilograms

• not enough information

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A watermelon is balanced by a dog, a pumpkin, a flowerpot, and a baseball as shown. Which statement or statements are true?

• The mass of the watermelon is equal to the mass of the flowerpot, baseball, dog and pumpkin combined.

• The weight of the watermelon is equal to the weight of the flowerpot, baseball, dog and pumpkin combined.

• C. Both A and B are true.

• D. Neither A or B is true.

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