Thermal Expansion Liquids Quiz: Fluids Under Pressure

1. Why does ice float on top of liquid water?

Ice is heavier

Ice is less dense than liquid water

Ice has no particles

Liquid water is colder

Because water expands as it freezes, ice has more volume for its mass, making it less dense than the liquid around it.

Explanation

Because water expands as it freezes, ice has more volume for its mass, making it less dense than the liquid around it.

2. Which common tool is a perfect example for a liquid expansion test?

A ruler

A liquid thermometer

A scale

A magnifying glass

Thermometers work because the liquid (alcohol or mercury) expands up the narrow tube as it gets warmer.

Explanation

Thermometers work because the liquid (alcohol or mercury) expands up the narrow tube as it gets warmer.

3. Which of these factors affect how much a liquid expands? (Select all that apply)

The type of liquid

The amount of heat added

The color of the liquid

The starting volume

The liquid's identity, the temperature change, and how much liquid you start with all determine the final expansion.

Explanation

The liquid's identity, the temperature change, and how much liquid you start with all determine the final expansion.

Submit

4. If you fill a car's gas tank to the very brim on a cold morning and leave it in the hot sun, what might happen?

The gas will shrink

The gas will change color

The gas may overflow

Nothing

The gasoline will undergo thermal expansion in the heat and may exceed the volume of the tank.

Explanation

The gasoline will undergo thermal expansion in the heat and may exceed the volume of the tank.

5. Liquid particles are in constant contact with each other even while they are moving.

True

False

Unlike gas particles, liquid particles stay touching but "slide" past one another.

Explanation

Unlike gas particles, liquid particles stay touching but "slide" past one another.

6. How does liquid volume change when it is heated?

It decreases

It stays the same

It increases

It turns into a solid

When liquids are heated, particles move faster and push further apart, causing the total volume of the liquid to increase.

Explanation

When liquids are heated, particles move faster and push further apart, causing the total volume of the liquid to increase.

7. What happens to the "gaps" between liquid particles during thermal expansion?

They get smaller

They disappear

They get larger

They stay the same

Thermal expansion is literally the result of the average distance between particles increasing.

Explanation

Thermal expansion is literally the result of the average distance between particles increasing.

8. Why do we use narrow tubes in thermometers for a heat effects on liquids quiz?

To save money on liquid

To make the expansion easier to see

To keep the liquid clean

To make the tube stronger

A small change in volume causes a large visible change in height when the liquid is forced into a very thin tube.

Explanation

A small change in volume causes a large visible change in height when the liquid is forced into a very thin tube.

9. If you put a cold bottle of water in the sun, the water level will ______ slightly.

As the water warms up, it expands and the level in the bottle will go up.

Explanation

As the water warms up, it expands and the level in the bottle will go up.

Submit

10. In thermal expansion questions, what is "absolute expansion"?

The liquid getting hotter

The real total increase in liquid volume

The liquid turning into gas

The liquid freezing

Absolute (or real) expansion is the actual increase in the liquid's volume, regardless of the container.

Explanation

Absolute (or real) expansion is the actual increase in the liquid's volume, regardless of the container.

11. Most liquids have a definite shape but no definite volume.

True

False

This is flipped! Liquids have a definite volume but no definite shape (they take the shape of their container).

Explanation

This is flipped! Liquids have a definite volume but no definite shape (they take the shape of their container).

12. Which state of matter expands the most for the same increase in heat?

Solid

Liquid

Gas

They all expand the same

Gases expand much more than liquids because their particles have almost no attraction to one another.

Explanation

Gases expand much more than liquids because their particles have almost no attraction to one another.

13. In a thermometer, if the temperature drops, the liquid level moves ______.

Cooling causes thermal contraction, so the liquid takes up less volume and the level in the tube falls.

Explanation

Cooling causes thermal contraction, so the liquid takes up less volume and the level in the tube falls.

Submit

14. Adding thermal energy to a liquid makes the particles vibrate less.

True

False

Adding thermal energy increases particle motion, making them move and vibrate more vigorously.

Explanation

Adding thermal energy increases particle motion, making them move and vibrate more vigorously.

15. The speed at which particles in a liquid move is directly related to their ______ energy.

Temperature is a measurement of the average kinetic energy (motion) of the particles.

Explanation

Temperature is a measurement of the average kinetic energy (motion) of the particles.

Submit

16. In physics heat expansion test experiments, what happens to the density of a liquid when it expands?

It increases

It decreases

It stays the same

It becomes zero

Since the mass stays the same but the volume increases, the particles are less "packed," which means the density is lower.

Explanation

Since the mass stays the same but the volume increases, the particles are less "packed," which means the density is lower.

17. Liquids generally expand more than solids when heated to the same temperature.

True

False

Because the bonds between particles in a liquid are weaker than in a solid, the particles can move further apart more easily.

Explanation

Because the bonds between particles in a liquid are weaker than in a solid, the particles can move further apart more easily.

18. When a liquid is cooled and its volume decreases, this is called thermal ______.

As particles lose thermal energy, they slow down and move closer together, causing the liquid to take up less space.

Explanation

As particles lose thermal energy, they slow down and move closer together, causing the liquid to take up less space.

Submit

19. Which of these liquids would expand if heated from 20∘C to 50∘C?

Water

Cooking Oil

Rubbing Alcohol

Mercury

Almost all liquids expand when their temperature increases in this range.

Explanation

Almost all liquids expand when their temperature increases in this range.

Submit

20. Water is unusual because it actually expands as it cools from 4∘C down to 0∘C.

True

False

This is called "anomalous expansion." Most liquids contract when cooling, but water starts to expand again just before it freezes.

Explanation

This is called "anomalous expansion." Most liquids contract when cooling, but water starts to expand again just before it freezes.

Rising Levels: The Thermal Expansion Liquids Quiz

1. Why does ice float on top of liquid water?

2. Which common tool is a perfect example for a liquid expansion test?

3. Which of these factors affect how much a liquid expands? (Select all that apply)

4. If you fill a car's gas tank to the very brim on a cold morning and leave it in the hot sun, what might happen?

5. Liquid particles are in constant contact with each other even while they are moving.

6. How does liquid volume change when it is heated?

7. What happens to the "gaps" between liquid particles during thermal expansion?

8. Why do we use narrow tubes in thermometers for a heat effects on liquids quiz?

9. If you put a cold bottle of water in the sun, the water level will ______ slightly.

10. In thermal expansion questions, what is "absolute expansion"?

11. Most liquids have a definite shape but no definite volume.

12. Which state of matter expands the most for the same increase in heat?

13. In a thermometer, if the temperature drops, the liquid level moves ______.

14. Adding thermal energy to a liquid makes the particles vibrate less.

15. The speed at which particles in a liquid move is directly related to their ______ energy.

16. In physics heat expansion test experiments, what happens to the density of a liquid when it expands?

17. Liquids generally expand more than solids when heated to the same temperature.

18. When a liquid is cooled and its volume decreases, this is called thermal ______.

19. Which of these liquids would expand if heated from 20∘C to 50∘C?

20. Water is unusual because it actually expands as it cools from 4∘C down to 0∘C.