Science Heat

What is temperature?

• It is a form of energy.

• It is a measure of how hot or cold an object is

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Which is true about how heat travels?

• Heat travels from a hotter region to cooler region

• Heat travels from a cooler region to hotter region

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NGSS.MS-PS1-4

The pictures shows two beakers containing water, both at 80 degree Celsius. Which beaker contains more heat?

• Beaker 1

• Beaker 2

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NGSS.MS-PS3-4

Which is NOT a good conductor of heat?

• Steel

• Iron

• Air

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NGSS.MS-PS3-3

Which object is a conductor of heat?

• Metal nail

• A rubber band

• A tree

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NGSS.MS-PS3-3

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Jane places four different materials at the same temperature onto a hot plate. The materials are then being heated up to find out which material conducts heat the best.

The picture shows the temperature of each material after 15 minutes. Which material conduct heat the best?

• Material 1

• Material 2

• Material 3

• Material 4

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NGSS.MS-PS3-3

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A pot of water with an egg sits on a hot stove. Which of the following correctly describes a flow of heat energy in the diagram?

• Heat energy flows from the egg to the stove.

• Heat energy flows from the egg to the water.

• Heat energy flows from the water to the pot.

• Heat energy flows from the water to the egg.

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Julie’s teacher told her that cotton wool is a poor conductor of heat.

Julie covered two of the containers, A and B, with different amount of cotton wool as shown below. She then poured the same amount of boiling water into Containers A, B and C at the same time. The temperature of the water was measured every two minutes.

Which one of the following graphs shows the results of her experiment?

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NGSS.MS-PS1-4

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When holding a cup of ice water, your warm hand becomes cold. How does the heat transfer?

• From the cold cup to your hand

• From the cold cup to the warm air

• From the ice to your hand

• From your warm hand to the cold cup.

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NGSS.MS-PS3-4

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An experiment was carried out with four different rods made of different materials, A, B, C and D. They were at room temperature of 30 degree Celsius at the start of the experiment. Each rod was put into a container filled with melting ice cubes at the same time as shown above.

After 2 minutes, the temperature at the other end of each rod was recorded as shown in the diagram above. Which rod, A, B, C or D, is the poorest conductor of heat?

• A

• B

• C

• D

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NGSS.MS-PS3-4