Q2 CBA Force, Motion, and Energy

A student wants to design an experiment to test the effects of gravity on different objects. Choose which plan would allow the student to collect data about gravity.

• Drop two balls that are different masses from the same height.

• Throw a ball using different amounts of force each time.

• Kick a ball wearing different shoes each time.

• Roll two balls that are different colors across the floor.

Tags

NGSS.MS-PS2-2

Students want to test if the amount of friction between an object and a wood floor changes if the floor is wet. Part A: How can they test this?

• Slide the same object on both a wet and a dry floor.

• Slide different objects on a wet floor.

• Slide different objects on a dry floor.

• Slide one object on a wet floor and a different object on a dry floor.

Tags

NGSS.MS-PS2-2

Students want to test if the amount of friction between an object and a wood floor changes if the floor is wet. Part B: Which measurement will allow students to decide how water affects friction?

• the mass of the object

• the length of the floor

• how far the object moves

• the color of the floor

Tags

NGSS.MS-PS2-2

Look at the picture showing different sizes of paper clips that students accidentally dropped behind a bookshelf. Students cannot reach the paper clips with their hands. The students have some magnets. They want to see which magnets can pick up both the large and small paper clips. How can they test which magnet will pick up both sizes of paper clips? Should they use large or small paper clips for their test? Where should they put the magnet for their test? Choose the word to complete the first blank: Place a ____ paper clip on the table.

• large

• small

• medium

• tiny

Tags

NGSS.3-PS2-3

NGSS.3-PS2-4

Look at the picture showing different sizes of paper clips that students accidentally dropped behind a bookshelf. Students cannot reach the paper clips with their hands. The students have some magnets. They want to see which magnets can pick up both the large and small paper clips. Choose the word to complete the second blank: Next, place different sizes of magnets ____ the paper clip to see if they pick up the paper clip.

• near

• far from

• on top of

• behind

Tags

NGSS.MS-PS2-5

Which are the best ways to test how magnets pull on some objects at a distance? Choose all that apply.

• Bring a magnet close to metal objects and see if they move.

• Bring a magnet close to plastic objects and see if they move.

• Touch a magnet to metal objects and see if they stick.

• Touch a magnet to plastic objects and see if they stick.

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Students build a bridge using toothpicks. They place a small, round piece of clay on the bridge. To test how strong the bridge is, should they place a smaller or larger piece of clay on the bridge? Complete this sentence: Place ____ pieces of clay on the bridge until the bridge breaks.

• larger

• smaller

• lightest

• heaviest

Tags

NGSS.MS-PS2-2

Students build a bridge using toothpicks. They place a small, round piece of clay on the bridge. How will changing the size of the clay affect the force on the bridge? Complete this sentence: Place larger pieces of clay on the bridge to increase ____ until the bridge breaks.

• force

• friction

• distance

• color

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Look at the pictures of a toy car rolled down two ramps with different surfaces. The left pictures show the car before it rolled; the right pictures show the car after it rolled. How far did the car move on the plastic ramp compared to the wood ramp? Choose TWO answers.

• The car moved 2 times as far on the plastic ramp compared to the wood ramp.

• The car moved 40 cm on the plastic ramp and 20 cm on the wood ramp.

• The car moved 2 times as far on the wood ramp compared to the plastic ramp.

• The car moved 40 cm on the wood ramp and 20 cm on the plastic ramp.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Look at the pictures of a toy car rolled down a wood ramp and a plastic ramp. The left pictures show the car before it rolled; the right pictures show the car after it rolled. How can the motion on the two ramps be explained?

• The wood ramp generates a greater frictional force than the plastic ramp.

• The plastic ramp generates a greater frictional force than the wood ramp.

• The wood ramp generates a greater gravitational force than the plastic ramp.

• The plastic ramp generates a greater gravitational force than the wood ramp.

Tags

NGSS.MS-PS2-2