The Structure of the Solar System

Many objects, including planets, travel around the Sun.

• orbit

• rotate

• revolve

• spin

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NGSS.MS-ESS1-1

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Orbiting objects made of gas, dust, and ice come from the outer parts of the solar system.

• comet

• asteroid

• planet

• moon

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The Sun is a(n) structure in space made of gases in which nuclear fusion reactions occur.

• star

• planet

• comet

• asteroid

In 365 days, Earth completes a(n) full journey around the Sun.

• period of revolution

• period of rotation

• lunar cycle

• solar cycle

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NGSS.MS-ESS1-1

In 24 hours Earth completes a(n) full turn, also called a complete spin.

• period of rotation

• orbit

• revolution

• axis shift

Millions of small, rocky objects orbit the Sun between the orbits of Mars and Jupiter.

• asteroid

• comet

• planet

• moon

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NGSS.MS-ESS1-3

A(n) distance equal of about 150 million km is the average distance from Earth to the Sun.

• astronomical unit

• light year

• parsec

• kilometer

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NGSS.MS-ESS1-3

Bonus Question: A region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun

Bonus Question: A spherical object that orbits the Sun?

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NGSS.MS-ESS1-3

Bonus Question: Who proposed that Earth and other planets revolve in circular orbits around a stationary Sun, a heliocentric model?

• Johannes Kepler

• Galileo

• Nicholas Copernicus

• Sir Isaac Newton

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NGSS.MS-ESS1-2

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