Phase changes and particle motion are the focus of this Grade 7 Science worksheet for the Matter and Chemical Change unit. Students connect melting, freezing, evaporation, and condensation to changes in particle kinetic and potential energy, energy transfer, and physical changes in matter.

Build a particle-level explanation of phase energy as students examine what happens when particles absorb or release energy during a change of state. The resource introduces latent heat as energy transferred during a phase change without changing a substance's chemical identity, helping students connect observable changes with particle behavior.

Concepts and Question Types

Students work with the energy patterns associated with melting, freezing, evaporation, and condensation, including whether energy is absorbed or released and how particle kinetic and potential energy change. They also distinguish the physical energy signatures of phase changes from those associated with chemical reactions.

The worksheet includes multiple-choice questions, true-or-false statements, short-answer responses, a reading passage, matching, a cloze passage, an essay, and a “Did You Know?” section. These formats give students opportunities to identify concepts, explain relationships, apply vocabulary, and communicate scientific reasoning in writing.

Teacher and Student Support

• ✅ Student Notes & Lesson Summary supplement for reinforcing the lesson concepts
• ✅ Separate Teacher Guide with Learning Objectives and Teaching Tips
• ✅ Discussion Questions to support classroom discussion
• ✅ Common Mistakes section for addressing likely misconceptions

Use It Within a Matter and Chemical Change Lesson

Use this phase changes worksheet for classroom practice, independent work, review, or written reinforcement after teaching particle motion and energy transfer. Students can use the questions to connect macroscopic phase changes with what particles are doing and how energy moves during those changes.

The resource is identified with the Alberta framework and supports instruction on phase energy, particle motion, latent heat, and the distinction between physical and chemical changes. The accompanying student supplement and teacher guide add practical support for lesson preparation, classroom discussion, and misconception checking.