Gravity Review

High and low tides are the regular pattern of rising and sinking ocean water levels. They are formed as a result of the gravitational forces of the moon and sun on Earth's oceans. The moon has a greater effect than the sun on the Earth's oceans. Why would the moon have a greater effect than the sun?

• The moon is not as hot as the sun

• The moon has less mass than the Earth

• The moon has less mass than the sun

• The moon is closer to Earth than the sun is

Tags

NGSS.MS-ESS1-1

Melissa watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher, as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown?

• applied force

• air resistance

• electrical force

• gravitational force

Tags

NGSS.MS-PS2-4

These objects are placed 1 meter apart.

Which of the following is true of this scenario?

• The gravitational force between the two objects is very strong because they are close together

• The gravitational force between the two objects is very weak because their masses are so small

• No gravitational force exists between the two objects because they are not touching

• No gravitational force exists between the two objects because their masses are so small

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NGSS.MS-PS2-4

NGSS.MS-PS2-5

The dotted lines in the picture show orbital paths of objects.

Which statement is true about all of the orbits shown?

• The force of gravity is what holds each object in its orbit

• The size of an object determines the size of its orbit

• The size of both an object and the object it orbits are equal

• All orbiting objects follow an elliptical path

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

The law of universal gravitation says all bodies attract each other. If you drop a cup, it falls to Earth. Why doesn't the gravitational attraction between your hand and the cup keep the cup from falling?

• The law of universal gravitation only applies to planets in space

• There is a gravitational attraction between you and the cup, but Earth's gravity is stronger, so Earth's gravity pulls the cup down

• The gravitational attraction between you and the cup is so strong that the force pushes the cup down

• There is no gravitational attraction between you and the cup, so Earth's gravity pulls the cup down

Tags

NGSS.MS-PS2-4

What is gravity?

• the force that pushes all objects toward Earth

• the force that pulls all objects toward one another

• a magnetic force that is strongest at Earth's poles

• a stream of charged particles from the sun to the Earth

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

Which statement about the universality of gravity is untrue?

• The gravitational force between two objects depends only on their masses

• The gravitational force between two objects increases if the mass of one object increases

• The gravitational force between two objects increases if the distance between objects decreases

• Any two objects that have mass also have a force of gravity acting between them, no matter how far apart they are

Tags

NGSS.MS-PS2-4

Two objects have a certain gravitational force 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 objects would remain constant

• The gravitational force between the two objects would increase

Tags

NGSS.MS-PS2-4

Which of the following would exert the greatest gravitational force on a body?

• a bar magnet

• a molecule

• a person

• a planet

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NGSS.MS-PS2-4

What is the gravitational force acting on an object that has a mass of 10 kg?

• 0.2 kg

• 9.8 kg

• 10 kg

• 98 kg