NGSS.MS-ESS1-2

What forces cause a planet to orbit?

• gravity and orbit
• gravity and inertia
• gravity and mass
• gravity and weight

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NGSS.MS-ESS1-2

What force acted on the massive nebula to collapse it and eventually form our sun?

• electrostatic force
• strong force
•  weak force
• gravity

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NGSS.MS-ESS1-2

Why do all of the planets orbit the sun rather than Earth?

• the sun has more mass
• the sun is a star
• the Earth is heavier
• the sun is in the middle of the milky way

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NGSS.MS-ESS1-2

The sun and all of the planets and other bodies that travel around it. 

• Geocentric
• Centripetal Force
• Sunspot
• Solar System

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Why does the Earth orbit the Sun and not a planet in the solar system?

• The Sun is more massive than the planets so it's mass causes the gravitational pull.
• It just happened that way.
• The Earth pulls the Sun toward it  because it is so massive.
• The Earth is closer than the other planets so the distance causes the gravitational pull.

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NGSS.MS-ESS1-2

What keeps the planets in orbit around the Sun?

• air resistance

• friction

• gravity

• magnetism

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An object that revolves around another object in space (natural or manmade)

• mirror

• microscope

• oscilloscope

• satellite

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NGSS.MS-ESS1-2

How long does it take Jupiter to revolve around the sun?

• 24 Hours

• 11.9 Years

• 21.7 Hours

• 365 Days

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NGSS.MS-ESS1-2

Kepler's second law also states that a planet will speed up or slow down in its orbit.

• True

• False

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NGSS.MS-ESS1-2

Scientists must consider many factors when using a spacecraft to change the path of asteroids traveling close to Earth. Using figure 1, Explain how the effect of Earth's gravity could change the orbital motion of an Apollo asteroid.

• If an Apollo Asteroid gets too close to Earth, Earth's gravitational force can pull the asteroid into Earth's orbit

• If an Apollo Asteroid gets too close to Earth, Earth's gravitational force can push the asteroid into Earth's orbit

• If an Apollo Asteroid gets too close to Earth, Earth's gravitational force can pull the asteroid and cause it to collide with Earth

• If an Apollo Asteroid gets too close to Earth, Earth's gravitational force can push the asteroid into orbit with Mars

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