ScienceFreePrintable

Phases of Matter Worksheet

A free science worksheet ready for your classroom. Open in Kuraplan to grab the print-ready PDF, customize it for your students, or generate a fresh version in seconds.

Download now

Name:Date:

Phases of Matter Worksheet

A materials lab is testing a mystery substance as it is heated and cooled. Use evidence and your knowledge of phase changes to explain what happens. Answer every question; show your reasoning where asked.

Particle Models and Properties

Use your science knowledge to answer the questions.

1.A sealed syringe contains a small amount of gas. The plunger is pushed inward. Which explanation best describes why the gas volume can decrease substantially?

Gas particles shrink when pressure is applied.
There is a large amount of empty space between gas particles, so they can be pushed closer together.
The particles change into liquid as soon as the plunger moves.
Gas particles stop moving when they are compressed.

2.A student says, “The particles in a solid do not move.” Correct this statement. Describe the particles’ arrangement and motion in a solid.

3.A sample of ice is warmed until it becomes liquid water. Explain what happens to energy and particle motion during melting, and state what happens to the particles’ arrangement.

4.Match each process to its description: melting, freezing, vaporization, condensation, sublimation, or deposition.

Liquid changes to gas
Gas changes directly to solid
Solid changes to liquid
Gas changes to liquid
Liquid changes to solid
Solid changes directly to gas

Deposition
Melting
Sublimation
Vaporization
Condensation
Freezing

Follow the Heating Data

A lab group heats a pure substance at a steady rate and records its temperature. Use the table to interpret the changes. The pressure stays constant.

Time (min)

Temperature (°C)

-20

5.During which time interval is the substance melting? What evidence in the data supports your answer?

6.At 3 minutes, the sample is still changing state. Is all of the sample solid, all liquid, or a mixture? Explain.

7.Between 4 and 8 minutes, the temperature rises from 0°C to 40°C. What state is the sample in during this interval, and what does the rising temperature tell you about its particles?

Apply the Model

Use phase changes to explain observations in everyday life.

8.Water droplets form on the outside of a cold drink on a warm, humid day. Explain where the liquid water comes from and name the phase change.

9.A piece of dry ice (solid carbon dioxide) seems to disappear without forming a puddle at normal room conditions. Name the phase change and describe what happens to its particles.

10.A sealed, flexible bag of air is placed in a freezer. Assuming the air does not condense, predict how cooling affects the particles’ average kinetic energy and the bag’s volume. Explain your prediction.

3 printable pages

Page 1
Page 2
Page 3

Download now

About This Worksheet

Free in Kuraplan

Print-Ready

Formatted for standard paper. Clean layout, easy to read.

AI-Generated

Created with Kuraplan's AI, designed for real classroom use.

For Teachers & Parents

Use in classrooms, for homework, tutoring, or homeschool.

Need a custom version of this worksheet?

Kuraplan's AI generates custom worksheets in seconds — differentiated for every learner, aligned to your curriculum.

Generate Custom Worksheets — Free

No credit card Curriculum-aligned Under 60 seconds

More Science Worksheets

Phases of Matter Worksheet

Phases of Matter Worksheet

Particle Models and Properties

Follow the Heating Data

Apply the Model

3 printable pages

About This Worksheet

Free in Kuraplan

Print-Ready

AI-Generated

For Teachers & Parents

Need a custom version of this worksheet?

More Science Worksheets

Changes Cut and Paste

Matter States and Atoms

States of Matter Properties

Matter Properties Investigation

Matter Properties Exploration Worksheet

Matter Changes

Cooling Curves Interpretation

Matter Changes Exploration

Explore more free resources