Investigating Heat - Expansion & Contraction

Which quantity measures the degree of hotness or coldness of a body?

• boiling point

• melting point

• temperature

• thermal conductivity

What happens when a solid is heated?

• The solid expands and increases in size.

• The solid expands and decreases in size.

• The solid contracts and increases in size.

• The solid contracts and decreases in size.

What happens when a liquid is heated?

• The liquid expands and increases in volume.

• The liquid expands and decreases in volume.

• The liquid contracts and increases in volume.

• The liquid contracts and decreases in volume.

What happens when gases gains heat?

• The gas contracts and increases in volume.

• The gas expands and decreases in volume.

• The gas expands and increases in volume.

• The gas contracts and decreases in volume.

When the round-bottomed flask is placed in a basin of hot water, what will happen to the liquid level in the thin tube?

• The liquid level in the thin tube will stay at the same level.

• The liquid level in the thin tube will rise.

• The liquid level in the thin tube will drop.

What causes the balloon to be inflated when the bottle is put in hot water?

• Air in the bottle increases in mass when heated.

• Air in the bottle increases in volume when heated.

• The balloon increases in size when heated.

• The balloon increases in volume when heated.

Diagram shows an iron ball before heated and after being heated.

Why can the iron not pass through the iron ring?

• the ring contracts and becomes smaller

• the iron ball expands and becomes larger

• the ring expands and becomes larger

• the iron ball contracts and becomes larger

Observe the diagram . Coloured water level ................ after being put in the hot water.

• falls

• rises

• remain the same

As a solid is heated, the particles:

• speed up & have more kinetic energy

• slow down & have less kinetic energy

• stay the same

• vibrate at fixed positions

The small gaps between tracks of train enable the tracks to ______________ during a hot day and prevents any damage.

• contract

• expand

• longer

• shorter