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WorksheetYear 8Level 2 · Standard

Free Year 8 Physical and Chemical Change: Looking for Evidence Worksheet

Students learn the difference between a physical change, where no new substance forms, and a chemical change, where new substances are made. They classify everyday changes, use evidence such as gas production, colour change, temperature change and the formation of a precipitate to decide whether a reaction has happened, explain why one piece of evidence is not proof, and apply conservation of mass to simple calculations.

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Year
Year 8
Subject
Science
Topic
Mixtures & Chemical Reactions
Difficulty
Level 2 · Standard
Estimated time
40 minutes
Curriculum
Australian Curriculum
Questions
25
Answers
Included, with working
Format
PDF (A4), print or complete online

Students will practise

  • distinguishing physical changes from chemical changes
  • classifying everyday changes as physical or chemical
  • identifying evidence that a chemical change has occurred
  • explaining why one observation is not proof of a chemical change
  • explaining changes using the particle model
  • applying conservation of mass to simple calculations

Curriculum: Australian Curriculum. We show specific outcome codes only where they have been verified against the official curriculum document.

What's next?

Completed: Physical and Chemical Change: Looking for Evidence

  1. 1Elements, Compounds and Mixtures
  2. 2Solutions, Solubility and Concentration
Study guide

How to use this worksheet

  1. Print the PDF or complete it on screen. Write the student's name and date at the top.
  2. Read the instructions for each part together before starting. Encourage working to be shown.
  3. Mark with the answer sheet. Use the model answers and success criteria as a guide rather than a single right answer.
  4. Record the score, celebrate what went well, then follow the "What's next" suggestion.

Common questions

Who is this worksheet for?

Year 8 students (typically ages 13–14) working on mixtures & chemical reactions. It is pitched at level 2 · standard.

Are the answers included?

Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.

How long does it take?

About 40 minutes for 25 questions. Short, regular sessions work best: two or three a week beats one long one.

Do I need to sign up to download?

No. Click Download Free PDF and it opens immediately. It is free for personal, classroom and homeschool use.

What should we do next?

Try Elements, Compounds and Mixtures.

Preview

Success TutoringWorksheetsYear 8 · Science · Mixtures & Chemical Reactions

Physical and Chemical Change: Looking for Evidence

Name

Date

Score /

Ask yourself: has a new substance been made? If yes, it is a chemical change.

Part A: Physical or chemical?

Decide whether each change is a physical change or a chemical change.

In a physical change, no new substance is made. The substance may change state, shape or size, or it may dissolve, but its particles stay the same. Physical changes are usually easy to reverse.

In a chemical change (a chemical reaction), one or more new substances are made. The atoms in the starting substances (reactants) are rearranged to form different substances (products) with different properties. Chemical changes are usually difficult to reverse.

1.Ice melting into water
  1. APhysical change
  2. BChemical change
2.A piece of wood burning
  1. APhysical change
  2. BChemical change
3.An iron nail rusting
  1. APhysical change
  2. BChemical change
4.Sugar dissolving in water
  1. APhysical change
  2. BChemical change
5.A cake baking in an oven
  1. APhysical change
  2. BChemical change
6.Cutting a sheet of paper into pieces
  1. APhysical change
  2. BChemical change
7.Milk turning sour
  1. APhysical change
  2. BChemical change
8.Water boiling in a kettle
  1. APhysical change
  2. BChemical change
9.A firework exploding
  1. APhysical change
  2. BChemical change
10.Crushing an empty drink can
  1. APhysical change
  2. BChemical change

Part B: Evidence of a chemical change

Observations such as fizzing or a colour change are evidence of a chemical change, but they are not proof. Scientists look for several pieces of evidence and for a new substance.

11.List four observations that can be evidence that a chemical change has happened. (answer space)
12.Two clear, colourless solutions are mixed in the school laboratory and a cloudy yellow solid appears. What is this solid called, and what does it suggest? (answer space)
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Preview — the PDF contains the full resource and answer sheet.

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About this resource

Created by
Success Tutoring Science Team
Last reviewed
1 October 2026
How it was made
Written by our team

Free to print and share for personal, classroom and homeschool use. Please don't resell. Spotted an error? Let us know.