Unit 2 Review

Which of the following best describes the role of gravity in the motion of planets within the solar system?

• Gravity keeps planets in a straight line.

• Gravity causes planets to orbit the sun.

• Gravity pushes planets away from the sun.

• Gravity has no effect on planetary motion.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What are the primary factors that determine the gravitational force between two objects?

• The color of, and the distance between the objects.

• The distance between the objects and their masses.

• The masses and speed of the objects.

• The speed and color of the objects.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

If a planet A is twice as far from the sun as planet B, the gravitational force is 4 times weaker. How will this affect the speed of planet A's movement around the Sun?

• Planet A will move faster than Planet B.

• Planet A will move slower than Planet B.

• Both planets move at the same speed.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following best describes how the mass of an object affects its motion when a specific force is applied?

• More mass means more acceleration.

• Less mass means less acceleration.

• More mass means less acceleration.

• Mass does not affect acceleration.

Tags

NGSS.MS-PS2-2

When an object is in orbit around another object it is said to be in constant___________.

Tags

NGSS.MS-PS2-1

How does the gravitational force between two objects change if the mass of one object is doubled?

• It is halved.

• It is doubled.

• It is quadrupled.

• It remains the same.

Tags

NGSS.MS-PS2-4

Which of the following best describes the scale properties of the solar system?

• All planets are the same size.

• The sun is the smallest object.

• Planets vary greatly in size and distance from the sun.

• All planets are equidistant from the sun.

Tags

NGSS.MS-ESS1-3

What happens to the motion of an object if the forces acting on it is balanced

• The object speeds up.

• The object slows down.

• The object changes direction.

• The object remains at rest or moves at a constant speed.

Which of the following statements is true about the gravitational interactions between the Earth and the Moon?

• The Earth attracts the Moon, but the Moon does not attract the Earth.

• The Moon attracts the Earth, but the Earth does not attract the Moon.

• Both the Earth and the Moon attract each other.

• Neither the Earth nor the Moon attract each other.

Tags

NGSS.MS-PS2-4

Which of the following best describes the effect of gravity on galaxies?

• Gravity causes galaxies to shrink.

• Gravity causes galaxies to expand.

• Gravity holds galaxies together.

• Gravity has no effect on galaxies.

Tags

NGSS.MS-ESS1-2