TCI Gravity

The moon revolves around Earth. The moon travels at a speed of about 1 km/s. What keeps the moon in orbit around Earth?

• gravity

• magnetism

• ocean tides

• nuclear fusion

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Two objects have a certain gravitational fore between them. What would happen if the mass of one of the objects suddenly increased?

• The mass of the other object would increase

• The distance between the objects would increase.

• The gravitational force of the ojects would remain constant.

• The gravitational force between the two objects would increase.

Tags

NGSS.MS-PS2-4

Why are Earth, other solar system planets, and most planetary objects spherical?

• force of gravity acting evenly in all directions around the center of mass

• erosion made by asteroids hitting the object's surface at the time of formation

• heat received from the sun melting the objecct's surface at the time of formation

• pressure of atmosphere acting evenly in all directions on the object's surface

Tags

NGSS.MS-ESS1-2

Planets are held in their orbit because of their large sizes as well as a certain force that acts over a distance. Which force is responsible for acting on the planets?

• nuclear force

• electrical force

• magnetic force

• gravitational force

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

True or False: As one object gets closer to another object, the force of gravity will increase.

• True

• False

Tags

NGSS.MS-PS2-4

True or False: As one object gets closer to another object, the force of gravity will increase.

• True

• False

Tags

NGSS.MS-PS2-4

Earth's gravity is ​ ​ (a)   ​ m/s2.​ ​

• 9.8

• 12

• 1,000

• 8.809

Here is a model of the gravitational force of Mars. Objects A and B have the same mass but are different distances from Mars. Which statement explains how the gravitational force affects the two objects?

• Object A and B will be affected equally by the gravitational force.

• Object B will be more affected by the gravitational force because it is closer to Mars than Object A.

• Object A will be more affected by the gravitational force because it is farther from Mars than Object B.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The satellite is orbiting Earth in the direction shown and is pulled toward Earth by gravity. What would happen if Earth's gravity suddenly disappeared?

• The satellite would fall to Earth.

• The satellite would stop moving.

• The satellite would continue to orbit Earth.

• The satellite would move into space in a straight line.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Observe the path of Voyager 2 satellite . Why did the route of Voyager 2 change, without firing its thrusters, as it passed Jupiter?

• Gravitational force between Jupiter and Voyager 2 pulled it into a new route.

• Solar winds pushed Voyager 2 into a new path.

• Jupiter blocked the sun’s gravitational pull on Voyager 2.

• The gravity of Jupiter caused Voyager 2 to become its satellite.

Answer explanation

Large planets have enough mass to exert a significant pull on an object traveling near them. Scientists used the gravitational forces of the large planets to give Voyager a “boost” so that it moved faster.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4