PSLE Science: Heat Energy and Train Tracks

What is the main topic discussed in the video?

• Electric circuits

• Photosynthesis

• Heat energy and train tracks

• The water cycle

What happens to train tracks when the temperature drops?

• They expand and increase in volume

• They remain the same

• They contract and decrease in volume

• They melt

Why are gaps left between train tracks?

• To save materials

• To allow for expansion and contraction

• For aesthetic purposes

• To make the tracks lighter

What effect does a hotter day have on train tracks?

• The tracks remain unchanged

• The tracks expand and gaps decrease

• The tracks contract and gaps increase

• The tracks become brittle

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• Dislike it

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