Tek Science

Students are investigating how mass affects the force needed to move an object. They attached a wooden block to a spring scale and placed a 10 g mass on top of the block and pulled it 50 cm across a table top. As they did, they observed the force shown on the spring scale. Which of the following describes the next step they should take in their investigation?

• Pull the spring scale a longer distance.

• Cover the table top with a carpet square.

• Repeat the same steps using a heavier mass.

• Attach a smaller block to the spring scale

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A group of students wanted to compare the distances a toy car travels after leaving ramps of different heights. What tool would provide the most useful information for their comparison?

• Stop watch

• Pan balance

• Hand lens

• Meter stick

Tags

NGSS.MS-PS3-1

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 each trial.

• 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

A group of students collected the following data by pulling a toy car back at 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.

• starting pull-back point increased.

• temperature in the classroom increased.

• surface on which the car rolled was changed.

Tags

NGSS.MS-PS2-2

Students create balloon rockets by taping drinking straws to balloons and running a thick string through the straw. The ends of the string are held tightly apart. When the balloon is inflated and released, it moves along the string. What should the students do to change the amount of friction that slows the motion of the balloon rocket?

• Try different color balloons.

• Use a different type of tape.

• Replace the string with thin wire.

• Hold the string ends closer together.

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-PS2-2

Students wanted to see if the distance a marble rolled down a ramp changed the force it had. They allowed a marble to roll down the ramp from different starting points and strike a second marble. To determine if the force of the rolling marble changed, what should the students measure?

• The mass of Marble #2 before and after being struck by Marble #1.

• The distance Marble #2 moves after being struck by Marble #1.

• The time it takes Marble #2 to move after being struck by Marble #1.

• The direction Marble #2 moves after being struck by Marble #1.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Students hung three washers on a string 20 cm long off the edge of a desk and timed how long it took the washers to swing back and forth one time. They repeated the investigation, using the same three washers, with string that was 30cm and 40 cm long. The students are testing the effect of which factor on the time it takes the washers to swing?

• Height of desk

• Length of string

• Number of washers

• Number of swings

Tags

NGSS.MS-PS2-2

Some students wanted to find out if a tennis ball and a baseball dropped from the same height hit the ground at the same time. This investigation tests the effect of which of the following?

• Wind

• Friction

• Gravity

• Magnetism

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Students taped a rubber band to a box of washers, then dragged the box across four different surfaces, using the rubber band. The students are using the distance the rubber band stretches to measure the amount of friction each surface exerts on the box. Based on the observations shown here, which surface had the greatest amount of friction?

• Surface A

• Surface B

• Surface C

• SurfaceD

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Some students launched an air rocket several times. Each time they increased the number of pumps before releasing the rocket. What data should they collect in order to test how the number of pumps affects the movement of the rocket?

• The height the rocket rises each time.

• The width of the rocket on its base.

• The distance from the pump to the rocket.

• The volume of air the pump holds.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1