Pull down on the rope

Raise up his arms.

Let go of the rope.

Tie the rope to something.

Which material has the greatest volume?

How do blocks of different sizes change in weight?

How does the material used affect weight?

How does the material used affect luster?

triple beam balance, meter stick, block, 5 foot tall student

4 foot tall student, 4 1/2 foot tall student, 5 foot tall student, block

plastic block, wooden block, metal block, glass block

blacktop pavement, concrete sidewalk, classroom carpet, gym floor, block

The students had the same speed while swinging.

The students used different amount of force while swinging.

The students were on the swing for the same amount of time.

The students used the same amount of force while swinging.

Do flowering plants grow better when watered with salt water?

How much fertilizer do flowering plants need?

Does fertilizer added to the soil lead to taller flowering plants?

How tall do flowering plants grow?

air

gravity

mass

friction

Changing the position but not the motion of the basketball

Doing work by pushing the basketball, changing its motion and position

Changing the position and motion of the basketball without doing any work

Doing work by pulling the basketball and changing its position but not its motion

The brakes heat the rubber on the bicycle tires.

The brakes add energy to the bicycle.

The brakes increase the force of gravity on the bicycle.

The brakes cause frictional force on the wheels of the bicycle.

Student A

Both student A and student B

Student B

Neither student A nor student B