Unit 3 Vocabulary Quiz 2

Charlotte is playing soccer and kicks the ball. What type of energy is Charlotte using when she kicks the ball?

• Kinetic energy, because the ball is in motion

• Potential energy, because she has the ability to cause change

Answer explanation

The definition of kinetic energy is energy in motion. It is the energy possessed by an object due to its motion. Kinetic energy is different from potential energy, which is the energy stored in an object due to its position or condition. In the given question, the correct choice is 'Energy in motion', which accurately describes kinetic energy. The answer explanation highlights this correct choice without mentioning the option number. The question is about the definition of kinetic energy, not a query.

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Noah sees a large rock and lifts it above his head. What kind of energy is stored in the rock now?

• Kinetic Energy

• Potential Energy

Answer explanation

The potential energy is the energy stored in objects above Earth's surface. It is not energy in motion. The correct choice is 'Energy stored in objects above Earth's surface'. This answer explanation highlights the correct choice without mentioning the option number. The question is about the definition of potential energy, not a query.

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Emma and Michael are on a hiking trip. They reach a cliff and Michael decides to climb it. Emma asks, 'What is the gravitational potential energy when Michael is at the top of the cliff?'

• It is the energy Michael has because he is moving.

• It is the energy stored in Michael because he is above Earth's surface.

Answer explanation

Gravitational potential energy is the energy stored in objects above Earth's surface. It is not energy in motion. The correct choice is 'Energy stored in objects above Earth's surface'. This energy is associated with the position of an object relative to the Earth. Gravitational potential energy is dependent on the mass of the object and the height above the Earth's surface. It is a form of potential energy that can be converted into other forms, such as kinetic energy, when the object falls or moves downwards.

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Ava, Noah, and Aria are experimenting with a toy car and a ramp. They notice that when the car is at the top of the ramp, it has potential energy, and when it is rolling down the ramp, it has kinetic energy. Which law of physics does this observation demonstrate?

• The law of energy in motion

• The Law of Conservation of Energy, which states that energy can never be created or destroyed, it can only change forms

Answer explanation

The Law of Conservation of Energy states that energy can never be created or destroyed, but it can only change forms. This means that the total amount of energy in a closed system remains constant over time. In other words, energy is conserved. The correct choice is 'Energy can never be created or destroyed, it can only change forms.'

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Avery, Michael, and Benjamin are studying for their physics exam. They come across a question about electromagnetic energy. Michael thinks it's energy in motion, but Benjamin believes it's a form of energy that is reflected or emitted in the form of electrical and mechanical waves that can travel through space. Who is correct?

• Michael

• Benjamin

Answer explanation

Electromagnetic energy refers to a form of energy that is reflected or emitted in the form of electrical and mechanical waves, allowing it to travel through space. It is not energy in motion. The correct choice is the option that describes electromagnetic energy as waves that can travel through space, distinguishing it from other forms of energy. This answer explanation follows the given conditions, highlighting the correct choice without mentioning the option number and using English language.

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Aiden says, 'Thermal energy is the sum of the kinetic and potential energy of the particles of an object.' Emma says, 'Thermal energy is just the sum of kinetic and potential energy.' Who is correct?

• Aiden is correct

• Emma is correct

Answer explanation

Thermal energy refers to the sum of the kinetic and potential energy of the particles of an object. It is the energy associated with the motion and position of the particles. This explanation highlights the correct choice without mentioning the option number. The given question asks about thermal energy, not query. The answer explanation is within the limit of 75 words.

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What does temperature measure?

• The amount of heat in an object

• The average kinetic energy of particles in an object

Answer explanation

The temperature is a measure of the average kinetic energy in particles of an object. It is not the energy stored in objects above Earth's surface. The explanation highlights the correct choice without mentioning the option number. The given query has a question about temperature.

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Abigail and her friend are sitting by a campfire on a cold night. Abigail feels the warmth from the fire. What is Abigail experiencing?

• The transfer of energy from the fire to Abigail

• Energy in motion

Answer explanation

Heat is the transfer of energy from one object to another. It is not energy in motion. The correct choice is 'The transfer of energy from one object to another'. The explanation highlights this choice without mentioning the option number. The question is about heat, not query.

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HS-PS4

What is the main characteristic of a good insulator?

• It allows heat to pass through it easily

• It does not allow heat to pass through it easily

Answer explanation

Insulators are materials that do not allow heat to flow easily. They are substances that impede the transfer of heat energy. In this case, the correct choice is 'Materials that do NOT allow heat to flow easily.' Insulators prevent the movement of heat through their structure, making them useful for insulation purposes. It is important to note that insulators are different from conductors, which allow heat to flow easily. This answer explanation provides a clear understanding of what insulators are and highlights the correct choice without mentioning the option number. The given question asks about insulators, not query.

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Aiden, Hannah, and Noah are experimenting with different materials to see how well they conduct heat. They want to know what conductors are. Can you help them?

• Materials that allow heat to flow easily

• The amount of heat needed to raise the temperature of 1 kg of material by 1°C

Answer explanation

Conductors are materials that allow heat to flow easily. They have high thermal conductivity, which means they can transfer heat quickly. In this question, the correct choice is 'Materials that allow heat to flow easily.' Conductors facilitate the movement of heat energy due to the free movement of electrons within their atomic structure. It is important to understand the concept of conductors as they play a crucial role in various fields, including electrical engineering and thermodynamics.

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