Investigating Heat - Expansion & Contraction

What happens when a solid gains heat?

• The solid expands and increases in volume.

• The solid expands and decreases in volume.

• The solid contracts and increases in volume.

• The solid contracts and decreases in volume.

What happens when a liquid gains heat?

• 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.

Why did the train tracks become crooked?

• The train tracks gained heat, expanded and increased in length.

• The train tracks lost heat, contracted and decreased in length.

What can be done to ensure that the tracks do not become crooked like this? You may choose more than one answer.

• Expansion gap should be included between adjacent tracks.

• A shorter track should be used.

• A longer track should be used.

• Each track should be made up of many shorter tracks, placed adjacent to one another.

What is heat?

• Heat is a state of matter.

• Heat is a form of energy.

• Heat is a property of matter.

• Heat is a force.

What is temperature?

• Temperature is a form of energy that flows from a region with higher temperature to a region with lower temperature.

• Temperature is a force that can move objects from one place to another.

• Temperature is a process that causes matter to change in states.

• Temperature is a measure of the degree of hotness or coldness of an object.

What causes the balloon to be inflated?

• 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.

The diagram shows a bimetallic strip made of two metals, brass and iron. Which metal, brass or iron, bends more when heated?

• Brass

• Iron