Energy Conservation

Which of these best shows a change from potential to kinetic energy?

• Water flowing over a tall cliff

• A metal spring being stretched

• Electricity making a bulb light up

• A stone lying on top of a mountain

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NGSS.MS-PS3-4

What is the scientific meaning of energy?

• anything that has mass

• the ability to cause change

• anything that cannot be seen

• the property of something to take up space

Tags

NGSS.MS-PS3-5

Matt and Kim use bowling balls with different masses. If they both roll their bowling balls at exactly the same speed, which claim could be supported by the evidence?

• The bowling ball with less mass has more kinetic energy.

• The bowling ball with more mass has more kinetic energy.

• The kinetic energies of the two bowling balls are the same.

• There is not enough information to compare the kinetic energies.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of these is an example of the conversion of kinetic energy into gravitational potential energy?

• a bicyclist coasting down a long hill

• a car engine moving the car forward

• a roller coaster car moving toward the top of a rise in the tracks

• a thrown ball falling toward the ground after passing through the top part of its motion

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The International Space Station revolves around Earth at a constant distance above Earth's surface. Which of the following claims about the energy of the station is true?

• It has no energy because it is stationary.

• It has potential energy but does not have kinetic energy.

• It has kinetic energy but does not have potential energy.

• It has both potential energy and kinetic energy.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which of these is an example of the conversion of elastic potential energy into kinetic energy?

• a person running on a level track

• an apple falling from a tree to the ground

• a windup spring making a toy car move across the floor

• a rubber band that is being stretched to twice its normal length

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Which of these is an example of kinetic energy?

• wind blowing

• water in a glass

• a can of vegetables

• the walls of a building

Tags

NGSS.MS-PS3-1

Sarah is sitting at the top of the slide in the school's playground. Which of the following changes will increase Sarah's kinetic energy?

• An additional child is added to the top of the slide.

• Sarah is pushed and moves down the slide.

• Sarah climbs down the ladder and off the slide.

• The ladder is moved to the other side of the yard.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Tyler has learned that potential energy is energy stored. Tyler's teacher asks the students to come up with a demonstration of potential energy. Which of the following would best work for this demonstration?

• A parked car in the driveway.

• Wheels spinning on the ground.

• A rock after it has been thrown.

• A child at the top of a slide.

Tags

NGSS.MS-PS3-2

Energy is always conserved. It cannot be created or destroyed. It can, however, be transferred between objects or systems, from one form to another. Which of the following is true of the relationship between kinetic and potential energy?

• When a system loses kinetic energy, it loses potential energy.

• As kinetic energy decreases, potential energy decreases.

• When a system gains kinetic energy, it loses potential energy.

• As kinetic energy increases, potential energy increases.

Tags

NGSS.MS-PS3-5