Solar System Unit 8 Review

The following image is from a newly discovered solar system. Based on your knowledge of our solar system, which planet would take the least amount of time to orbit the star?

• Planet A

• Planet B

• Planet C

• Planet D

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Which of the following is true about the planets in the solar system?

• All planets complete one revolution about every 365 days.

• All planets have one moon.

• All planets have an elliptical orbit.

• All planets have the same surface temperature

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A student writes the following in his notes:

This object is much bigger than Earth. It is mostly gas, is generally round, and has many moons.

Which of these is the student describing?

• The Sun

• Jupiter

• Venus

• Mars

The planets of the solar system revolve around the Sun in orbits because of the Sun's

• gravity

• rotation

• heat energy

• magnetic field

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5. (6.11B) Which statement explains what would happen if gravity between Earth and the Sun suddenly didn’t exist?

• Earth would move off into space in a straight line at a constant speed.

• Earth would move off into space in a curved path. Its speed would gradually decrease.

• Earth would continue to orbit the Sun exactly as it does now.

• Earth would continue to orbit the Sun, but would move more slowly that it does now

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There are 8 known planets orbiting the Sun. The data table below lists some facts about the planets. If a 9th planet were detected in the region past Neptune, what is one thing about it you could say for certain?

• Its period of revolution would be greater than Neptune

• Its mass would be greater than Jupiter.

• The length of one day would be greater than Mars

• The number of moon would be greater than Saturn.

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Assuming each sphere was made of the same material (same mass/same density), in which scenario would there be a greater gravitational attraction between the spheres?

• 
• 
• 
• 

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The diagram below models Mercury and Venus orbiting the Sun. What force causes Venus to travel along a curved path instead of moving in a straight line as indicated by the dashed line in the diagram?

• Electromagnetic attraction between the Sun and Venus

• Gravitational attraction between the Sun and Venus

• Electromagnetic attraction between Mercury and Venus

• Gravitational attraction between Mercury and Venus

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A timeline is given, which includes some significant milestone years in exploration. A student is

writing a report on the history of space exploration. Who should be included for improving the design of the telescope in the 1600s and discovering many

objects in the solar system?

• Hipparchus

• Galileo

• Gagarin

• Armstrong

What is any object that revolves around another object in space?

• rocket

• vacuum

• satellite

• shuttle

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