4.7

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4.7 describe the role of convection in everyday phenomena

Task 1

·         Try the animation

·         Extension: what is happening to the particles in the air?

The particles in the air vibrates more causing the air space between them to increase and the density to decrease, therefore, rising up. The cool air goes down to replace the risen particles. This causes a convection current.

Task 2

·         Why is Lee tired after cycling to the Sea in the morning?

Lee is tired after cycling to the sea in the morning because the sun heats up the land, making the air heat up quickly, increasing the spaces between the particles and decreasing the density ∴ the hot air rises. The cold air from the sea replaces the space, creating a convection current. This means that Lee is always cycling against the wind making him very tired.

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Predict what will happen when Lee cycles home in the evening

Lee will still be tired when he cycles home in the evening because at night, the convection current will still be there. However, the opposite direction.

Convection in a room with a radiator.swf Download this file