Evidence of Chemical Changes is a Grade 7 Science resource focused on matter and chemical change, helping students use observations and particle-level reasoning to distinguish chemical changes from physical changes.

Students examine observable evidence that a chemical change has occurred and connect those observations to what happens to particles and bonds during chemical reactions. The resource emphasizes scientific reasoning rather than simply identifying examples, giving students opportunities to explain why evidence supports a chemical change.

What Students Practise

The activities address key ideas in chemical change through multiple-choice questions, true/false statements, short-answer responses, a reading passage, matching, a cloze passage, an essay, and a “Did You Know?” section. Students work with observations of change, particle-level bond changes, and the distinction between physical and chemical changes.

This combination supports students as they move from recognizing observable evidence to explaining chemical reactions at the particle level. It also gives them opportunities to communicate scientific reasoning in both selected-response and written formats.

Included Teacher Support

• Student Notes & Lesson Summary supplement for reinforcing the key learning
• Teacher Guide with Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

The supplementary materials give teachers a practical way to introduce or reinforce the topic while anticipating common misconceptions about chemical and physical changes.

Classroom Use

Use this chemical changes worksheet as guided practice, independent classwork, review, or a lesson follow-up within a Grade 7 matter and chemical change unit. The varied response formats allow students to demonstrate their reasoning in different ways while keeping the focus on observable evidence and particle-level explanations.

With its focus on chemical change evidence, chemical reactions, particle-level bond changes, and physical versus chemical changes, this resource provides targeted practice for students working with the core ideas of matter and chemical change. The stated framework is Alberta.