What characteristic of the Sun keeps the planets in orbit?

• The Sun's location in the galaxy

• The Sun's color

• The Sun's size

• The Sun's mass

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8-ESS1-2

What would happen to the planets if the gravity of the Sun were to suddenly shut off?

• They would continue to revolve around the Sun.

• The planets would move faster around the Sun.

• The planets would move slower around the Sun.

• They would continue to move in a straight line out into space.

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8-ESS1-2

You have a tennis ball on a string and you are twirling the ball in a circle over your head. This represents how a planet revolves around the Sun. In this example, what force does the string represent?

• The force of motion of the planet

• The force of gravity between the planet and Sun

• The force of inertia of the planet

• The force of momentum of the planet

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8-ESS1-2

What force holds stars together in a galaxy?

• The force of gravity

• The force of motion

• The force of magnetism

• The force of nature

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8-ESS1-2

On Earth, a student weighs 100 lbs. The student calculated what the weight would be on different planets in the solar system. The results are shown in the table.

 

Which statement is best supported by the information in the table?

• Mars has more gravitational force than Venus because of its mass.

• Earth has 4 times the gravitational force of Mars because it is a shorter distance from the Sun.

• Jupiter has more than twice the gravitational force of Earth because of Jupiter’s mass.

• Venus has more gravitational force than Earth because it is a shorter distance from the Sun.

Tags

8-ESS1-2

A satellite orbits the Earth as shown in the illustration. Which graph shows the force of gravity on the satellite as it orbits the Earth.

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Tags

8-ESS1-2

As a comet moves closer to the Sun, the Sun's gravity makes the comet curve around the Sun. The comet does apply some gravitational force on the Sun also, but the Sun does not appear to move in space. Why does it not appear to move?

• The comet is too far away from the Sun for its gravity to effect the Sun

• The force of forward motion of the comet cancels the Sun's gravity

• The comet is too close to the Sun for the gravity to cause the Sun to move in space

• The Sun's mass is greater than the comet's mass

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8-ESS1-2

When a rocket is launched into space, what force is working against the rocket at the time of it's launch?

• The Earth's gravity

• The Earth's magnetism

• The force of friction

• The Earth's mass

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8-ESS1-2

Which of Jupiter’s moons experiences the greatest force of attraction to Jupiter?

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8-ESS1-2

Why can the astronauts jump higher on the Moon than they can on Earth?

• The Moon has less gravity than Earth

• The Moon has more gravity than Earth

• There is no atmosphere on the Moon to stop them

• The space suits help them move easier on the Moon

Tags

8-ESS1-2