Lab: Energy Transfer Answers

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1
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What evidence from the experiment shows that conduction occurred? In your answer, be sure to include the materials involved in the transfer of heat through conduction.

Answer:

Evidence that conduction occurred is seen when the chocolate pieces melt one after the other starting from the end closest to the heat source. Heat energy moved through the aluminum foil bridge, and since the chocolate pieces were in direct contact with the foil, heat was transferred to them through conduction.

2
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What did you include in your response? Check all that apply.

A
The melting of the pieces of chocolate one by one is evidence that conduction occurred.
B
As heat flowed through the foil bridge, heat transferred to the pieces of chocolate, causing them to melt.
C
The heat transfer occurred between the foil bridge and the chocolate pieces, which were in direct contact with one another.
140716

Which statements describe how heat flows in foil? Check all that apply.

A
Heat flows in all directions.
B
Heat flows from left to right only.
C
The atoms on top of the foil absorb heat first.
D
The atoms near the candle absorb heat first.
E
Heat flows from the cooler atoms to the warmer atoms.
F
Heat flows from the warmer atoms to the cooler atoms.
140719

conductionconvection✔ radiation

A
conduction
B
convection
C
radiation
140720

Which statement describes how heat flows from the coffee to the part of the spoon in the coffee?Heat flows from the coffee to the spoon through radiation.Heat flows from the coffee to the spoon through convection.Heat flows from the coffee to the spoon through conduction.Heat flows from the coffee to the spoon through radiation, convection, and conduction.

A
Heat flows from the coffee to the spoon through radiation.
B
Heat flows from the coffee to the spoon through convection.
C
Heat flows from the coffee to the spoon through conduction.
D
Heat flows from the coffee to the spoon through radiation, convection, and conduction.
140721

Which title best reflects the main idea of the passage?

A
The Role of Convection in the Distribution of Earth's Energy
B
The Role of Heat Transfer Methods in the Distribution of Earth's Energy
C
Conduction, Convection, and Radiation: Methods of Heat Transfer
D
Conduction, Convection, and Radiation: The Heating Up of Earth's Surface
140722

How did the lab activities help you answer the lesson question "How do the processes of conduction, convection, and radiation help distribute energy on Earth?" What did you learn from conducting this lab?

Answer:

The lab activities demonstrated that heat energy is transferred in three distinct ways. I learned that conduction occurs through direct contact, such as heat moving through aluminum foil. Convection transfers energy through the movement of fluids, which I observed in water. Radiation transfers energy through electromagnetic waves, as shown by the heat from the light bulb reaching the paper. Together, these processes explain how solar energy reaches Earth and is redistributed through the atmosphere, oceans, and land.

140723

Sample Response: In the lab, I conducted three experiments. In each experiment, energy in the form of heat was transferred in a different way. Energy can be transferred through a material like aluminum foil through conduction. In water, energy is transferred through convection. Energy can travel from the light bulb to the paper through radiation. I learned that conduction can move energy between Earth’s materials, convection can transfer heat through Earth’s waters, and radiation can transfer he

A
Conduction transfers heat between two materials that are touching, such as foil and chocolate pieces, or particles, such as the atoms in foil.
B
Convection allows heat to be transferred in liquids, like water.
C
Radiation transfers heat from a light bulb to paper.
D
Conduction, convection, and radiation move energy from the Sun to Earth and throughout Earth.

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