Lesson Quiz: Earth’s Place in Space

Which is of the following describes a planet?

• a swirling ball of gases

• a star

• a huge ball made out of rock

• a large object that orbits a star

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

• one day

• one week

• one month

• one year

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NGSS.MS-ESS1-1

Planets revolve around the Sun in an (a)   orbit.

• circular

• elliptical

A _____ contains billions of stars, dust, and gas that are all held together by gravity.

• planet

• star

• moon

• galaxy

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NGSS.MS-ESS1-2

The Milky Way is a ________________ that contains more than 200 billion stars.

This diagram shows the eight planets and one dwarf planet in the solar system. Between the inner and outer planets, there is a belt of space rocks called __.

• asteroids

• meteors

• comets

• stars

Stars appear in the night sky at different times of the year because of Earth's (a)   .

• Gravity

• Atmosphere

• Rotation

• Revolution

Ben looks up to the night sky in January and notices the constellation Orion. In February he stands in the same spot and notices that the stars have seemed to change position.

Explain why the stars are in a different position during different times of the year.

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NGSS.MS-ESS1-1

Based on the data in the table, which conclusions can you draw?

• The farther a planet is from the Sun, the shorter its year.

• The farther a planet is from the Sun, the longer it takes to orbit.

• A year on Mercury is longer than a year on Earth.

• The further a planet is from the Sun the longer its rotation.

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NGSS.MS-ESS1-2

NGSS.MS-ESS1-3