Unit 3

A push or pull that causes an object to move, stop, or change direction

• Force

• Gravity

• Friction

• Air Resistance

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A group of students designed an investigation to test the effects of force on a toy car. They observed the car rolling down a board covered with sandpaper and then down another board covered with wax paper. They noticed the car rolled farther on the board covered with wax paper. What force were the students investigating?

• gravity

• friction

• magnetism

• pull

Tags

NGSS.MS-PS2-2

Students are investigating motion with a rubber band car. They want to know how the number of winds of the rubber band affects how the car moves. They will record the number of winds of the rubber band. What other data will they need to collect?

• The distance the car travels when released

• The length of the rubber band during

• The amount of time it takes to wind the propeller

• The width of the surface on which the car moves

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The picture shows two trials of an experiment in which a spring scale was used to measure force. The experiment can be used to measure force.

• How mass affects the force needed to move objects

• How force affects the mass of two objects

• How the force used to pull a dictionary affects the mass of a box of marbles

• How the mass of a box of marbles affects the mass of a dictionary

Tags

NGSS.MS-PS2-2

A unit of measure for force.

• friction

• grams

• newton

• speed

Tags

NGSS.MS-PS2-1

A group of students collected the following data by pulling a toy car back different distances and then releasing it. According to the data, the distance the toy car traveled increased as the-

• mass of the car was decreased

• temperature in the classroom increased

• starting pull-back point increased

• surface on which the car rolled was changed

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question was the students most likely trying to answer?

• How does mass of a soda can affect the distance it will roll?

• How does surface friction affect the distance a soda can will roll?

• How does the size of a soda can affect the distance it rolls?

• How does ramp height affect the distance a soda can rolls?

Tags

NGSS.MS-PS3-1

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay. Why is the depth of the dent different in each trial?

• The size of the ball changes

• The mass of the ball when it hits the clay changes

• The force of the ball when it hits the clay changes

• The material of the ball changes

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The distance an object can travel in a specific amount of time is its

• speed

• motion

• position

• force

Tags

NGSS.MS-PS3-1

A car was traveling on a dirt road and on a concrete road. The car was able to travel on the concrete road without using as much force. Which description explains this scientific fact?

• The dirt road has more friction because the surface is not smooth.

• The concrete road has more friction because the surface is smoother.

• The concrete road has more gravity because the surface is not smooth.

• The concrete road has less gravity because the surface is not smooth.

Tags

NGSS.MS-PS2-2