Science Assessment

NG065005

A pendulum stops swinging because the motion energy of the ball is transferred somewhere else, like the air, as the ball swings from side to side.

RG074002

When a paper clip is moving toward a magnet, the kinetic energy of the paper clip increases, and the potential energy of the magnet/paper clip system decreases.

RG077003

When two pieces of tape repel each other, the potential energy that the pieces of tape have decreases as they are allowed to move apart and is converted into kinetic energy.

RG075003

When two repelling magnets are let go, some of the potential energy that the system of magnets had when they were being held close together is converted to kinetic energy when let go.

NG003004

Gravitational potential energy is transformed into motion energy and thermal energy when coasting down a hill on a bicycle.

NG005004

As a piece of clay falls, its gravitational potential energy is converted to motion energy, and as it hits the floor its motion energy is converted into thermal energy.

NG007004

When you let go of a stretched rubber band, the elastic energy that the rubber band has when it is stretched is converted into motion energy.

NG008004

The brake pads on a bike have more thermal energy after they are used to stop the bike because the motion energy that the bike and rider had was converted into thermal energy.

NG011004

When a box slows down as it slides across the floor, the motion energy of the box decreases and the thermal energy increases because the motion energy is converted into thermal energy.

NG018004

The thermal energy of a ball and a track increases the entire time the ball is rolling along the track because both the gravitational potential energy and the motion energy of the ball are converted into thermal energy.

NG079003

The motion energy of a book sliding across a table is transformed into thermal energy, not into a force.

NG099002

When skateboarding down a hill, gravitational potential energy is transformed into motion energy and thermal energy.

NG100002

When a ball is falling down, the gravitational potential energy of the ball is transformed into motion energy but the elastic energy of the ball is not.

RG124002

A child places a small stone in a slingshot and pulls the elastic band back. When the elastic band is released, the energy of the stone increases, and the energy of the elastic band decreases.

RG152002

As a boy pushes a girl on a swing, the boy’s energy decreases, and the girl’s energy increases because the boy transferred some of his energy to the girl when he pushed her.

NG078003

After a rubber band is used to shoot a toy car across the floor, the total energy of the system will remain the same because the increase in the motion energy (kinetic energy) of the car is the same as the decrease in the elastic energy of the rubber band.

NG088004

When a student shoots a rubber band across the room, the elastic energy of the rubber band is transformed into motion energy, and the total amount of energy stays the same. (This item uses bar graphs to depict the amount of each kind of energy.)