Understanding Energy Systems and Types

What is an open energy system?

• A system that exchanges only energy with its surroundings

• A system that exchanges both energy and matter with its surroundings

• A system that exchanges only matter with its surroundings

• A system that does not exchange energy or matter with its surroundings

Henry is conducting an experiment in his kitchen. He places a pot of water on the stove and covers it with a lid. Which of the following best describes the energy system of the pot?

• closed energy system

• open energy system

• no energy system

• hot energy system

Identify the type of energy stored in a stretched rubber band.

• Kinetic energy

• Thermal energy

• Chemical energy

• Elastic potential energy

Explain how energy is conserved in a closed system.

• Energy is lost to the surroundings

• Energy is created within the system

• Energy is neither created nor destroyed, only transformed

• Energy is destroyed within the system

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Which type of energy transformation occurs when a battery powers a flashlight?

• Chemical to thermal

• Electrical to light

• Chemical to electrical

• Light to chemical

Describe the energy transformation that occurs when a ball is thrown into the air and then falls back down.

• Kinetic to potential to kinetic

• Potential to kinetic to potential

• Thermal to kinetic to thermal

• Chemical to potential to chemical

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A pendulum is released from a certain height. At what point is its kinetic energy at maximum?

• At the highest point of its swing

• At the lowest point of its swing

• Halfway up its swing

• When it stops moving

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A car engine converts chemical energy into which type of energy to move the car?

• Thermal energy

• Electrical energy

• Mechanical energy

• Nuclear energy

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If a system is closed and isolated, what can be said about the total energy within the system?

• It increases over time

• It decreases over time

• It remains constant

• It fluctuates randomly

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A roller coaster car is at the top of a hill. As it descends, what happens to its potential and kinetic energy?

• Potential energy increases, kinetic energy decreases

• Potential energy decreases, kinetic energy increases

• Both potential and kinetic energy increase

• Both potential and kinetic energy decrease

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