NC 5.P.1.1

Two identical balls are pushed with the same force. One ball is pushed along a flat surface and the other ball is pushed down a slanted surface. Which ball will travel faster and why?

• the ball on the flat surface, because of increased friction

• the ball on the flat surface, because of decreased gravity

• the ball on the slanted surface, because of increased gravity

• the ball on the slanted surface, because of decreased friction

Tags

NGSS.MS-PS2-4

Jan has two identical magnets on her metal cabinet. She hangs a drawing using Magnet 1. She tries to hang a calendar using Magnet 2, but the calendar falls to the floor.
Which best explains why Magnet 1 can hold up the drawing but Magnet 2 is unable to hold up the calendar?

• The area near Magnet 1 has extra metal.

• The calendar is longer than the drawing.

• The area under Magnet 2 has more gravity.

• The calendar has a greater mass than the drawing.

Tags

NGSS.3-PS2-3

NGSS.3-PS2-4

The gravitational force of the Sun is strong enough to hold all the planets of our solar system in orbit many millions of miles away. Which best describes why objects having far less mass on the surface of these planets are not pulled off and into the Sun?

• The objects have too little mass to be affected by the Sun.

• The objects have more mass on the planets than on the Sun.

• The objects are held by the greater combined gravity of all the planets.

• The objects are more strongly affected by the gravity of the planet on which they are found.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What keeps the Moon orbiting Earth?

• the Sun’s gravity

• the Moon’s rotation

• Earth’s rotation

• Earth’s gravity

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which is the best example of a pushing force that reduces the speed of an object?

• a bat hitting a baseball

• a brake rubbing against a wheel

• a pedal turning the wheels of a bicycle

• a skateboard wheel rolling against pavement

Tags

NGSS.MS-PS3-5

Which information is needed to determine the speed of an object?

• the weight of the object and the the pull of gravity on the object and the amount of time it travelsdistance it travels

• the pull of gravity on the object and the amount of time it travels

• the inertia of the object and the amount of force that is pushing it

• the distance the object travels and the time it takes to travel that distance

Which tools will be most helpful to a scientist measuring motion?

• a measuring tape, a stopwatch, and a thermometer

• a compass, a stopwatch, and a measuring tape

• a stopwatch, a scale, and a thermometer

• a scale, a compass, and a stopwatch

A man is pushing a ball up a hill. If the man stops pushing the ball and steps out of the way, what will most likely happen to the ball?

• It will stop on the hill.

• It will roll down the hill.

• It will roll to the side toward the man.

• It will continue to roll up the hill.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which best describes the role friction plays in the operation of a car?

• Friction makes a car go faster.

• Friction keeps a car from stopping.

• Friction turns the car in a new direction.

• Friction helps a car slow down and stop.

Tags

NGSS.MS-PS3-5

Carey left a bowling ball and kickball outside on a windy day. Which best explains why the kickball moved but the bowling ball did not?

• The kickball has less mass so it was easier to move.

• The force of gravity acting on the bowling ball is greater.

• The mass of the kickball is greater so it is easier to move.

• The force of gravity acting on the kickball is greater.

Tags

NGSS.MS-PS2-2