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Heat Transfer CER Challenge

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Heat Transfer CER Challenge

A class is planning an outdoor picnic on a warm Australian day. Your job is to use science evidence to explain how heat moves and how insulation can slow it down. CER means Claim, Evidence and Reasoning. Use the information in each task; no equipment is needed.

Heat transfer toolkit

Heat energy moves from warmer places or objects to cooler ones. Conduction transfers heat through touching materials. Heat can also be transferred when liquids or gases, such as water or air, move. Radiation transfers energy across space, such as sunlight warming your skin. Insulation slows heat transfer; it does not stop it completely.

1.At the picnic, sunlight warms the top of a metal drink bottle. Which method transfers heat from the Sun to the bottle?

Conduction
Convection
Radiation

2.A metal spoon rests in warm soup. After a while, its handle feels warmer. Name the main method transferring heat through the spoon, and state where the heat moves from and to.

3.Warm air above a sunny picnic blanket rises while cooler air moves in to replace it. What is this movement of heat called?

Conduction
Convection
Radiation

Investigation evidence

A group tested two identical drink bottles, one wrapped in a thick insulating sleeve and one left uncovered. They poured the same amount of warm water into each. After 20 minutes, they measured the water temperature.

Bottle

Starting temperature

Temperature after 20 minutes

Uncovered bottle

60°C

48°C

Bottle with insulating sleeve

60°C

54°C

4.Which bottle cooled more during the test, and by how many degrees Celsius? Show your calculation.

5.Write one evidence sentence using the results to compare the two bottles. Include the measured temperatures.

6.Choose the best claim: Did the sleeve help keep the water warm? Use one result from the table as evidence and explain how it supports your claim.

7.Complete the CER explanation: A wooden spoon is usually safer to hold than a metal spoon left in warm soup. Give a claim, one relevant piece of evidence or observation, and reasoning about heat transfer.

8.True or false? Insulation creates cold and completely stops all heat transfer. Correct the statement if it is false.

TrueFalse

9.Match each picnic example to its main heat-transfer method: (A) sunlight warms a person; (B) a metal spoon warms where it touches hot soup; (C) warm air rises above the ground.

A. Sunlight warms a person
B. A metal spoon warms where it touches hot soup
C. Warm air rises above the ground

Conduction
Convection
Radiation

10.A cool drink is taken out of an insulated lunch bag on a hot day. State the direction heat will move and name one way the bag can slow that transfer.

11.A picnic cooler has a dark lid and a light-coloured lid option. Predict which lid may absorb less energy from sunlight. Give a reason, and describe one fair test you could use to check your prediction.

Choose one picnic example. Draw and label the warmer and cooler parts, show arrows for the direction heat moves, and name the main heat-transfer method.