Science Assessment

NG069005

In a situation involving two slides, and assuming no energy transfer between the slides and the students sliding on them or between the students and the air around them, two students of the same mass sliding down differently shaped slides will have the same speed at the bottom of the slides because the only source of motion energy is the change in gravitational potential energy, and both students experience the same change in gravitational potential energy.

51%

NG094003

Assuming no energy transfer between a ball and the track it is moving in, the amount of energy the ball has after it goes over a hill will be the same as before it went over the hill because the total amount of energy in the system did not change.

43%

NG068006

If a book falls off a shelf, the amount of energy the book has when it is on the floor is less than the amount of energy it had when it was on the shelf because the amount of energy of the floor has increased, and if energy increases in one part of a system, it must decrease in another.

42%

NG092003

Assuming no energy transfer between a ball and the track it is moving in, the amount of energy the ball has after it goes over a hill will be the same as before it went over the hill.

40%

NG093003

Assuming no energy transfer between a ball and the track it is moving in, the amount of energy the ball has after it goes over a hill will be the same as before it went over the hill because the total amount of energy in the system did not change.

38%

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.)

38%

NG089004

The total amount of energy in a lunch box containing only an ice pack and the air around it remains the same even after the ice pack gets warmer and the air gets colder. (This item uses bar graphs to depict the amounts of each form of energy.)

28%

NG067003

As a ball rolls back and forth along a curved track and the ball and track get a little warmer, the total energy of the ball and track system does not change because no energy was added or released from the system.

27%

NG104002

Assuming no energy transfer between a ball and the track it is moving in, the speed of the ball will be the same before and after rolling down into and up out of a dip because the total amount of energy in the system does not change.

23%

NG096003

The total amount of energy a ball has does not change after it goes down and up a dip because the total energy of the system (ball and track) does not change (assuming no energy transfer between the ball and the track and the ball and the air around it).

20%

NG095003

The total amount of energy a ball has does not change after it goes down and up a dip because the total energy of the system (ball and track) does not change (assuming no energy transfer between the ball and the track and the ball and the air around it).

17%

NG049004

When a spring is used to shoot a cart across the floor, the spring transfers energy to the cart. (This item uses bar graphs to illustrate the amount of elastic energy the spring has and the amount of motion energy the cart has as the cart is rolling across the floor.)

52%

RG205001

Chemical energy is converted into thermal energy and kinetic energy (motion energy) as runners run.

39%

NG063006

When a cold bottle is placed in a cabinet, the temperature of the bottle will increase and the temperature of the air in the cabinet will decrease because energy will be transferred from the air to the cold bottle.

36%

NG013003

As a rubber balls falls to the floor, the motion energy of the ball increases and the gravitational potential energy of the ball decreases because the gravitational potential energy is transformed into motion energy.

28%

RG064002

The amount of kinetic energy a white ball has after being hit by a black ball is less than the amount of kinetic energy the black ball had before the collision because when energy was transferred from the black ball to the white ball, some energy was also transferred to the surroundings.

27%

RG160002

As a meteoroid approaches the earth, the gravitational force field of earth causes some of the potential energy of the earth-meteoroid system to be converted to the kinetic energy of the meteoroid.

27%

RG196001

Chemical energy is transformed into kinetic energy (motion energy) in a battery operated watch.

26%

RG172002

The temperature of the surrounding environment increases during rusting because some chemical energy is converted into thermal energy during the chemical reaction.

25%

NG014003

As a rubber balls falls to the floor, the motion energy of the ball increases and the gravitational potential energy of the ball decreases because the gravitational potential energy is transformed into motion energy.

25%

RG028004

After a drummer hits a drum once, the energy of the drum will decrease because the sound will transfer energy away from the drum.

23%

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.

20%

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.

19%

NG012003

When a ball bounces off a floor, the elastic energy of the ball is converted into motion energy and gravitational potential energy.

18%

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.

14%

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.

11%

RG099002

After one car bumps into another car, the first car moves slower and second car moves faster because energy was transferred from the first car to the second..

10%

RG017003

A car gets the energy it needs to move by burning the gasoline.

9%