Unit 4 Review

Which of the following is the correct definition of electrical energy?

• energy an object has because of its motion or position

• energy resulting from the flow of charged particles, such as electrons or ions

• energy that is transmitted in the form of electromagnetic waves

• energy of an object due to the random motion of its atoms and molecules

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NGSS.HS-PS3-5

In hydroelectric power plants, the energy from moving water is converted into electric power. What kind of energy transformation occurs when the energy is converted?

• Light to Electrical

• Electrical to Mechanical

• Heat to Electrical

• Mechanical to Electrical

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NGSS.HS-PS3-3

A plant uses energy from the Sun to make food. What kind of energy transformation is this?

• Electromagnetic to mechanical

• Electromagnetic to chemical

• Mechanical to chemical

• Chemical to electromagnetic

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Lucas plugs a lamp into the wall. The light bulb in the lamp turns on. What kind of energy transformation is this?

• A. Light energy is transformed into mechanical and heat energy.

• B. Light energy is transformed into electrical and mechanical energy.

• C. Electrical energy is transformed into light and heat energy.

• D. Electrical energy is transformed into mechanical and heat energy.

What order do the energy transformations occur in a hybrid car if it uses a battery as a power source?

• Mechanical to Electrical to Chemical

• Electrical to Chemical to Mechanical

• Chemical to Electrical to Mechanical

• Chemical to Mechanical to Electrical

Tags

NGSS.HS-PS3-3

Energy that flows in a circulation pattern in a liquid or gas is known as?

• Conduction

• Convection

• Radiation

• Efficiency

Tags

NGSS.MS-ESS2-5

Electromagnetic energy travels in waves that are known as?

• Conduction

• Convection

• Radiation

• Efficiency

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NGSS.MS-PS4-1

Select the correct order of the seven forms of electromagnetic energy from weakest to strongest, where the answer is a short and concise sequence.

• Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays

• Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves

• Microwaves, Radio waves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays

• Radio waves, Infrared, Microwaves, Visible light, Ultraviolet, Gamma rays, X-rays

Identify the correct energy conversions in an electric power plant that burns fossil fuels and in a nuclear power plant.

• Fossil fuel plant: chemical energy to thermal energy to mechanical energy to electrical energy; Nuclear plant: nuclear energy to thermal energy to mechanical energy to electrical energy

• Fossil fuel plant: chemical energy to electrical energy only; Nuclear plant: nuclear energy directly to electrical energy

• Fossil fuel plant: thermal energy to mechanical energy to electrical energy only; Nuclear plant: chemical energy to thermal energy to electrical energy

• Fossil fuel plant: nuclear energy to thermal energy to electrical energy; Nuclear plant: thermal energy to mechanical energy to electrical energy

Hybrid cars are not 100% energy efficient. Which option best explains why a hybrid car might not be 100% energy efficient by identifying at least three factors that could affect its energy efficiency?

• Hybrid cars are 100% energy efficient because they combine electric and gasoline power without any losses.

• Hybrid cars are not 100% energy efficient due to factors such as battery charge/discharge losses, internal combustion engine inefficiencies, and frictional losses in mechanical components.

• Hybrid cars are fully efficient since all energy is perfectly converted from fuel to motion.

• Hybrid cars do not require energy because they run solely on renewable energy sources.

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS3-3