NGSS.MS-ESS1-2

An example of a gravitational interaction is that the Earth. . . 

• orbits the Sun.
• orbits the moon.

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NGSS.MS-ESS1-2

What holds the planets in their orbits around the sun?

• gravity
• speed
• string
• air currents

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NGSS.MS-ESS1-2

If you decrease the mass of the Sun too much, what happens to the Earth? (experiment #1)

• It leaves the Solar system.
• There is no apparent change in motion.
• It is pulled (crashes) into the Sun.

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NGSS.MS-ESS1-2

Which of the following components of the universe is best described as a system of stars, gases, and dust held together by gravity.

• a nebula
• a planet
• a meteor
• a galaxy

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NGSS.MS-ESS1-2

Which inference can be made about the comet’s orbit, when it is compared to Earth’s orbit ?

• Earth’s orbit and the comet’s orbit have the same distance between foci.

• Earth’s orbit has a greater distance between foci than the comet’s orbit.

• The comet’s orbit has one focus, while Earth’ orbit has two foci

• The comet’s orbit has a greater distance between foci than Earth’s orbit.

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NGSS.MS-ESS1-2

The force of gravity is responsible for continuously changing the ____________________ in which a satellite moves.

• direction

• orbit

• centripetal force

• gravitation

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NGSS.MS-ESS1-2

During neap tides, the gravitational effects of the sun and moon ______________ together.

• do not add

• are added

• increase

• don't change

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NGSS.MS-ESS1-2

Newton concluded that what 2 things combine to keep Earth in orbit around the sun and the moon in orbit around Earth?

• Gravity

• Inertia

• Tides

• Moons

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NGSS.MS-ESS1-2

Kepler's second law states that a planet will sweep out equal areas in equal intervals of time.

• True

• False

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NGSS.MS-ESS1-2

Kepler's third law states that the square of a planet’s orbital period equals one A.U. cubed or

• P³ = a².

• P² = a³.

• A.U. = astronomical unit.

• P³ = a³.

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NGSS.MS-ESS1-2