Energy

Which three forms of energy is the lamp using?

• heat, light, and sound

• electrical, light, and heat

• mechanical, sound, and light

• light, mechanical, and electrical

Which form of energy is a television least likely to use?

• light

• sound

• electrical

• mechanical

The image below shows the basic construction of a hydroelectric dam. A student claims that the type of energy transformation that occurs in this system is mechanical to electrical. Which of the following statements would BEST support the student's claim?

• Electricity must move to travel through power lines and reach people’s homes.

• The turbine must turn for electricity to flow from the generator to the power lines.

• Water must flow from a higher place to a lower one for electricity to be created.

• The electricity flowing through the power lines has enough energy to move objects.

Tags

NGSS.MS-PS3-5

A student looks at the picture. He claims that it shows electrical energy being transformed to thermal energy. Which of the following statements BEST supports the student’s claim?

• Particles in the burner collide more often as the temperature increases, which causes the burner to change color.

• Current flows into the stove burner, and bread placed on the burner will undergo a chemical change.

• The stove is plugged into an outlet, and if a pan with butter is placed on the burner, the butter will melt.

• A stove burner turned to high will allow more electrical energy to flow through it than a burner on low will.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Michael wants to make sure his hair is completely dry before he leaves his house in the morning. He plugs his hair dryer into the wall outlet and turns it on. Which of the following describes how energy is used to dry Michael's hair?

• Thermal energy is changed into electrical energy and sound energy.

• Light energy is changed into mechanical energy and sound energy.

• Sound energy is changed into light energy and electrical energy.

• Electrical energy is changed into thermal energy and mechanical energy.

What type of energy transfer is shown in this image?

• electrical to chemical

• chemical to mechanical

• chemical to electrical

• electrical to mechanical

Tags

NGSS.HS-PS3-3

Sailboats do not have an engine. Which statement best describes how sailboats move?

• The water has sea life which push the boat.

• The wind provides energy which pushes the boat.

• The air has oxygen which forces the boat to move.

• The Sun heats up the sail which causes the boat to move.

The picture shows a woman running. What is the main type of energy conversion taking place?

• Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.

• Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.

• Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.

• Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Jamie was studying mechanical energy in science class. She noticed several possible examples of mechanical energy in her environment. Which of the following is an example of mechanical energy?

• a garden hose with moving water

• an unused battery

• a windmill with no wind

• a lamp that is not plugged in

Sebastian walked along the shoreline of the ocean and observed only sand on the beach. The next morning, he observed several shells and rocks scattered on the sand. Which statement best explains how the shells moved onto the beach?

• Mechanical energy from the water carried the shells and rocks from the ocean floor to the beach.

• Thermal energy from the water carried the shells and rocks from the ocean floor to the beach.

• Electromagnetic energy from the Sun attracted the shells and rocks from under the sand.

• Chemical energy from the Sun attracted the shells and rocks from under the sand.

Tags

NGSS.MS-ESS2-1