W4 March S2-L Heat Expansion Contraction Quiz

A metal ball is unable to fit through the metal ring initially. Which of the following actions is/are likely to result in the metal ball passing through the metal ring?

I: cooling the metal ball

II: cooling the metal ring

III: heating the metal ball

IV: heating the metal ring

• I only

• I and IV only

• II and III only

• IV only

During a fire, it is best to crawl towards the exit to avoid the toxic fumes.

Why is there a need to crawl?

• Toxic fumes contract due to the heat, becoming denser than air.

• Toxic fumes contract due to the heat, becoming less dense than air.

• Toxic fumes expand due to the heat, becoming denser than air.

• Toxic fumes expand due to the heat, becoming less dense than air.

Which of the following equipment is least likely to use thermal expansion or contraction in order to fulfil its purpose?

• air conditioner placed near the ceiling of a room

• digital thermometer

• mercury thermometer

• ironing device

The density of a substance decreases when it is heated. Which state of matter will have the largest change in density?

• gas

• liquid

• solid

• none of the above

A glass flask was filled with coloured water, and a glass tube inserted into it. The flask was then placed into a basin of ice, as seen in this diagram.

Which one of the following statements best describes what you would observe next?

• The water level in the glass tube will drop.

• The water level in the glass tube will drop a little first before rising.

• The water level in the glass tube will rise.

• The water level in the glass tube will rise a little before dropping.