Energy Unit Part 2: Thermal Energy Transfer

Thermal energy transfers heat from –

• Warm objects to cool objects

• Large objects to small objects

• Cool objects to warm objects

• Less dense objects to more dense objects

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the best definition of temperature?

• Temperature is a measure of the total thermal energy of an object.

• Heat is a way to measure temperature

• Raising the temperature causes the molecules of a substance to move slower.

• As the temperature increases, the heat decreases.

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NGSS.MS-PS1-4

Emerson places a beaker of water on a hotplate and turns the hotplate on. The temperature in the room is 25 ºC. After the water heats to 75 ºC, she adds pieces of ice to the beaker. (a)  

• from the air to the water
• from the ice to the beaker
• from the water to the ice
• from the water to the hotplate

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Energy of a substance that is responsible for its temperature is called ___.

• temperature

• thermal energy

• potential energy

• chemical energy

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-3

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Observe the diagram. Which statement is true about the kinetic energy of the molecules in the containers?

• The molecules are moving faster in Diagram A

• The molecules are moving slower in Diagram A

• The molecules are moving at the same rate in both diagrams

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NGSS.MS-PS1-4

NGSS.MS-PS3-1

Which of the following is TRUE when particles GAIN Thermal Energy?

• Particles move more slowly
• Particles move further apart
• Particles stop moving
• Particles move closer together

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NGSS.MS-PS1-4

Stir frying vegetables is an example of what type of heat transfer?

• Convection

• Conduction

• Radiation

The sun shines down on this family as the play on the beach is an example of what type of heat transfer?

• conduction

• convection

• radiation

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NGSS.4-PS3-2

Cold Pack on Person: which way does heat energy transfer?

• Heat is transferred from the cold pack to the person.

• Heat is transferred from the person to the cold pack

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NGSS.MS-PS1-4