Which one of the following statements describe the effects of gravity on an object?

• The planets orbiting the Sun.

• Rain showers making the roads more slippery.

• A balloon floating into the sky when it is let go.

• Sliding a match across a rough surface to light it.

Tags

NGSS.MS-ESS1-2

Which phrase can be used to describe gravity?

• holds objects with mass in their place

• pushes objects away from the center of the Earth

• unequal force on an object

• exists between all objects in space

Tags

NGSS.5-PS2-1

Which of the following statements describes the effects of gravity on an object?

• A space shuttle leaves Earth's atmosphere.

• When a car brakes, the driver's body leans forward and pushes against the seatbelt.

• A baseball falls to the ground after being hit.

• An object floats on the surface of the water.

Which word belongs in the blank?

Gravity on the Moon is [_______] the gravity on Earth. This is due to the fact that the Moon is smaller than the size of Earth.

• greater than

• less than

• equal to

Bryan was watching a 'western' on TV. He watched as the cowboy tried to catch a calf using a rope. The cowboy swung the rope over his head in a circular motion at a constant speed and let it go. The rope moved outward as it fell to the ground. The cowboy missed the calf.

Why did the rope fall to the ground after the cowboy released the rope?

• The cowboy did not throw the rope hard enough.

• Gravity pulled it toward the Earth.

• The rope was too heavy.

• Magnetism drew the rope toward the ground.

Tags

NGSS.MS-PS2-4

During a baseball game, Morgan threw a pitch that was clocked at 62 mph.

If the fence had NOT stopped the ball, what would have brought the ball to the ground?

• gravitational pull of Earth

• friction in the air

• magnetic pull of the North Pole

• shape of the ball

Tags

NGSS.MS-PS2-4

Hank was driving his pickup truck down a dirt road. His dog was riding in the bed of the truck. All of a sudden, an opossum ran out in front of the truck. Hank slammed on the brakes to avoid hitting the opossum. This created an unbalanced force acting on the dog in the bed of the truck.

How would the force affect the dog?

• The dog would slide to the right side of the truck bed.

• The dog would slide to the left side of the truck bed.

• The dog would slide to the back of the truck bed.

• The dog would slide to the front of the truck bed.

Tags

NGSS.MS-PS2-2

A student plans an experiment to test the effects on an object in motion. She measures the velocity of a ball traveling at a constant speed. She wants to use a collision from a second ball of equal mass to change the initial ball's motion. The first ball is traveling at 10 m/s.

If the second ball strikes the first ball in a head-on collision at 5 m/s, the first ball will

______________________.

• move forward at the same speed

• move backwards at a slower rate

• move forward at a slower rate

• stop completely

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A child and dog are exerting the same amount of force on a rope. If the dog exerts more force, it will result in a(n) [________], and the dog will pull the rope away from the child.

• change in speed

• balanced force

• unbalanced force

• change in position

Tags

NGSS.3-PS2-1

A group of students rolled two bowling balls of the same size and mass across different surfaces. One bowling ball was rolled across a carpeted library floor, while the other bowling ball was rolled across a tile classroom floor. The students observed that [_________] caused the bowling ball rolled across the carpeted floor to come to a faster stop.

• speed

• friction

• gravity

• air resistance

Tags

NGSS.MS-PS2-2