How does energy change when a person lifts a box and places it on a shelf?

• Energy is transferred from the person to the box.

• No energy is transferred, but the energy of tof the box increases.

• There is an overall increase in the energy of the person and the box.

• Energy is transferred to the person, but the energy of the box does not change.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

What energy transfer occurs in a solar panel?

• Electrical energy is transferred to the panel when it is connected with an electrical source in a complete circuit.

• Electromagnetic energy is transferred to the panel when light waves from the sun are absorbed by the panel.

• Thermal energy is transferred to the panel when it is connected with an electrical source in a complete circuit.

• Mechanical energy is transferred to the panel when waves from the sun push against the panel and move it.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

The gravitational potential energy of a ball is 30 J when the ball is dropped. If mechanical energy is conserved , which energies are possible for the ball as it falls?

• A 30 J of kinetic energy and 30 J of gravitational potential energy

• 10 J of gravitational potential energy and 35 J of kinetic energy.

• 10 J of kinetic energy and 5 J of gravitational potential energy

• 10 J of gravitation potential energy and 20 J of kinetic energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Suppose a mechanical wave is traveling through medium A. When the wave enters medium B, it speeds up. Which of the following statements is true about medium A and medium B?

• Medium A is a solid and medium B is a gas.

• Medium A is a liquid and medium B is a solid.

• Medium A is a gas and medium B is a vacuum

• Medium A is a vacuum and medium B is a liquid.

Tags

NGSS.MS-PS4-2

A scientist places a block of hot metal in a jar of cool water. Because energy is conserved, what must happen?

• The sum of the thermal energy of the water and the thermal energy of the metal will increase.

• The thermal energy of the water and the thermal energy of the metal will remain the same.

• Some of the metal's thermal energy is transferred to the water as heat, but a small amount changes to mass.

• The thermal energy of the water will increase by the same amount that the thermal energy of the metal decreases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As energy in the form of heat is added to an ice cube, it begins to melt, What causes melting?

• Heat causes the molecules in the ice cube to expand and forces them apart.

• The transfer of thermal energy to the ice cube causes its molecules to move faster.

• Heat removes thermal energy from the ice cube and causes it to become liquid water.

• The additional energy causes the bonds between hydrogen and oxygen in the ice cube to break.

Tags

NGSS.MS-PS1-4

Plastic and wood are poor conductors of electric current, while copper and steel are good conductors of electric current. Which combination of materials would supply the most amount of resistance to an electric current?

• copper and steel

• plastic and copper

• plastic and wood

• wood and steel

Which of the following wires has the lowest resistance?

• a short, thick copper wire at 25 *C

• a long, thick copper wire at 35 *C

• a long, thin copper wire at 35 *C

• a short, thin iron wire at 25 *C

What type of energy is demonstrated when popping popcorn in the microwave?

• Mechanical energy

• Electromagnetic

• Sound

• Chemical

How is energy conserved?

• Transformed and Transferred

• Transformed and Wasted

• Transferred and Insulated

• Wasted and Insulated

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5