Thermal Energy Transfer in Systems

If you place a hot object into cool water, what must happen according to the law of conservation of energy?

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

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

• Some of the object'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 of the object decreases.

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NGSS.MS-PS3-3

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NGSS.MS-PS1-4

Sometimes, chefs want to take a pan or pot from the stovetop and put in the oven. Many of these have handles that are damaged by the high temperatures in the oven. Which statement best defines the design problem?

• The problem is to design ovens that won't reach high temperatures.

• The problem is to design stovetops that won't reach high temperatures.

• The problem is to design plastic handles that won't be damaged by high temperatures.

• The problem is to design pans that have handles that won't be damaged by high temperatures.

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NGSS.MS-ETS1-2

NGSS.MS-ETS1-1

Which of the following is designed to reduce thermal energy flow? Choose all that apply

• Mittens

• oven mitt

• iron frying pan

• Polystyrene ice chest

• gasoline engine cooling system

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NGSS.MS-PS3-3

Which of the following is designed to allow thermal energy flow? Choose all that apply.

• mittens

• oven mitt

• polystyrene ice chest

• iron frying pan

• gasoline engine cooling system

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NGSS.MS-PS3-3

Which statement is true about the direction of energy flow for a frying pan?

• Thermal energy flows from the stove to the pan to the food.

• Thermal energy flows from the pan to the stove.

• Thermal energy flows from the stove directly to the food.

• Thermal energy flows back and forth from the pan to the stove.

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NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which statement is true about the direction of energy flow for a glass of ice water?

• Thermal energy flows from the room to the glass.

• Thermal energy flows from the glass into the room.

• Thermal energy flows from the room, into the glass of water, and back out to the room again.

• There is no energy flow between the glass of water and the room.

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NGSS.MS-PS3-4

NGSS.MS-PS1-4

Which is the correct order of the Engineering Design Process?

• ask, create improve, plan, imagine

• ask, imagine, plan create, improve

• create, imagine, ask, plan, improve

• plan, create, imagine ask, improve

Which step is not required when solving a design problem?

• testing solutions

• brainstorming solutions

• evaluating and critiquing solutions

• alphabetizing or numbering solutions

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Which of these energy transfers occurs in a solar panel?

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

• 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.

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

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NGSS.MS-PS4-2

You want to design a jacket that can be worn in cold and snowy weather. Which set of criteria and constraints is most likely to lead to a successful solution?

• minimizes thermal energy transfer and made of a lightweight material

• maximizes thermal energy transfer and made of a lightweight material

• minimizes thermal energy transfer and made of a material that is not flammable

• maximizes thermal energy transfer and made of a material that is not flammable

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NGSS.MS-PS3-3

NGSS.MS-ETS1-2

NGSS.MS-ETS1-1