Lesson: States of Matter

In this lesson, we will learn how to describe the transitions between the three most common states of matter on the surface of the Earth: solid, liquid, and gas.

Sample Question Videos

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Worksheet: States of Matter • 9 Questions • 1 Video

Q1:

Which of the following states of matter are fluids?

  1. Solid
  2. Liquid
  3. Gas

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?

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

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

Q3:

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

Q4:

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

Q5:

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

Q6:

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

Q7:

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

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 was the water in between 0 and 5 minutes?

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

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

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

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?

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