Melting, freezing evaporation, condensation, sublimation worksheet

In this worksheet, we will practice describing the transitions between the three most common states of matter on the surface of Earth: solid, liquid, and gas.

Q1:

Which of the following states of matter are fluids?

• Aa and b
• Bb and c
• Ca and c

Q2:

The diagram shows water in its three different states: ice, liquid water, and steam.

What word is used to describe liquid water changing to ice?

• AMelting
• BFreezing
• CBoiling
• DSublimating
• ECondensing

What word is used to describe liquid water changing to steam?

• AMelting
• BCondensing
• CEvaporating
• DSublimating
• EFreezing

Under certain conditions, ice can skip the liquid phase entirely and become steam. What word is used to describe this?

• AMelting
• BSublimating
• CEvaporating
• DCondensing
• EBoiling

Q3:

Heating a substance increases the of the substance, which leads to a or a .

• Adensity, change in the mass of the substance, change in state
• Binternal energy, change in temperature, change in state
• Cdensity, change in temperature, change in state
• Dinternal energy, change in temperature, change in mass of the substance
• Einternal energy, change in mass of the substance, change in state

Q4:

Which of the following correctly describes what is meant by “evaporating?”

• A“Evaporating” is the process of a substance changing from a solid to a liquid.
• B“Evaporating” is the process of cooling a substance to 0∘C.
• C“Evaporating” is the process of a substance changing from a liquid to a gas.
• D“Evaporating” is the process of heating a substance to 100∘C.
• E“Evaporating” is the process of a substance changing from a gas to a liquid.

Q5:

Which of the following correctly describes what is meant by “freezing?”

• A“Freezing” is the process of cooling a substance below 0∘C.
• B“Freezing” is the process of a substance changing from a solid to a liquid.
• C“Freezing” is the process of a substance changing from a liquid to a solid.
• D“Freezing” is the process of cooling a substance to absolute 0.
• E“Freezing” is the process of a substance changing from a gas to a liquid.

Q6:

What word describes a substance changing from a gas to a liquid?

• AMelting
• BCondensing
• CEvaporating
• DFreezing
• EBoiling

Q7:

What word describes a substance changing from a solid to a liquid?

• ASublimating
• BMelting
• CFreezing
• DCondensing
• EEvaporating

Q8:

Some water vapor in a container is cooled. It first condenses to become water and then freezes to become ice. The temperature of the contents of the container are recorded every minute, and the results are shown in the graph.

What state is the water in between 0 and 5 minutes?

What state is the water vapor in between 40 and 45 minutes?

What word describes what is happening between 5 and 15 minutes?

• ASublimation
• BEvaporation
• CCondensation
• DMelting
• EFreezing

What word describes what is happening between 35 and 40 minutes?

• AFreezing
• BEvaporation
• CSublimation
• DCondensation
• EMelting

Q9:

Some ice is placed in a beaker and heated using a Bunsen burner. It eventually melts and becomes water. The water is then heated until it is boiling. The temperature of the contents of the beaker is recorded every minute, and the results are shown in the graph.

What state was the water in between 0 and 5 minutes?

What state was the water in between 10 and 30 minutes?

Between 30 and 40 minutes, the water was undergoing a change of state. Which word is used to describe this change of state?

• ACondensation
• BSublimation
• CEvaporation/boiling
• DMelting

Q10:

The graph shows the temperature of nitrogen in a container as it is cooled. The nitrogen starts as a gas at room temperature, is cooled to a liquid, and then finally turns to a solid.

What is the boiling point of nitrogen to the nearest degree Celsius?

What is the melting point of nitrogen to the nearest degree Celsius?

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