Density and Convection Quiz

The hand which is put over a lighted candle feels hot because hot air has high density so it moves up.

• True

• False

Hot air rises up as it has higher density than cold air.

• True

• False

The density of hot soup....................than that of cold soup.

Gases and liquids expand. b.y................ and contract by cooling.

When air is heated, it expands as its molecules move. .......each other. air.

When air is heated, the...................air will rise above the……air

The horizontal movement of air is called................... whereas the vertical movement of air is called.................

Put (✓) or (x): Cold air has more density than hot air.

• ✓

• x

Put (✓) or (x): Convection currents in the atmosphere are usually controlled by Earth's rotation.

• ✓

• x

Put (✓) or (x): Transfer of heat by convection occurs in solids, liquids and gases.

• ✓

• x