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Chemical and Physical Changes Practice Tests

These Grade 7 Science practice tests build understanding of physical and chemical properties, states of matter, particle motion, evidence of reactions, conservation of mass, and energy changes.

Skills covered

  • Distinguishing physical properties from chemical properties
  • Classifying melting, dissolving, cutting, burning, rusting, and reactions as physical or chemical changes
  • Using the particle model to explain states of matter and changes of state
  • Identifying reactants, products, evidence of chemical reactions, and conservation of atoms
  • Explaining exothermic and endothermic energy changes in matter systems

How to use these practice tests

For each question, ask whether the original substance keeps its chemical identity. Then use particle motion, reaction evidence, mass measurements, and energy observations to choose the best-supported answer.

For more Grade 7 Science practice, return to the Grade 7 Science category.

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1. Test

Grade 7 Chemical and Physical Changes Practice Tests

Practice Grade 7 Science questions about physical properties, chemical properties, matter changes, reactions, conservation of mass, and energy.

Choose the best answer for each question. Review the explanation after submitting your answers.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is a physical property?

Please select an answer first.

Correct answer: A

The correct answer is A characteristic that can be observed or measured without forming a new substance.

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Color, density, melting point, boiling point, and conductivity are physical properties because observing them does not change the substance identity.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Color, density, melting point, boiling point, and conductivity are physical properties because observing them does not change the substance identity.

2. QuestionMultiple choice

Which is a chemical property of iron?

Please select an answer first.

Correct answer: B

The correct answer is Its ability to react with oxygen and form iron oxide.

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: A chemical property describes how a substance can form new substances through a chemical reaction.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

A chemical property describes how a substance can form new substances through a chemical reaction.

3. QuestionMultiple choice

Which observation is a physical property?

Please select an answer first.

Correct answer: C

The correct answer is Copper conducts electricity..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Electrical conductivity can be measured without changing copper into a new substance.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Electrical conductivity can be measured without changing copper into a new substance.

4. QuestionMultiple choice

Which observation is a chemical property?

Please select an answer first.

Correct answer: D

The correct answer is A substance reacts with oxygen..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Reactivity with oxygen describes the ability to form a new substance, so it is a chemical property.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Reactivity with oxygen describes the ability to form a new substance, so it is a chemical property.

5. QuestionMultiple choice

Which is a physical change?

Please select an answer first.

Correct answer: A

The correct answer is Ice melts into liquid water..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Melting changes the state of water but not its chemical identity.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Melting changes the state of water but not its chemical identity.

6. QuestionMultiple choice

Which is a chemical change?

Please select an answer first.

Correct answer: B

The correct answer is A piece of paper burns and forms ash and gases..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Burning produces new substances, including ash and gases, so it is a chemical change.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Burning produces new substances, including ash and gases, so it is a chemical change.

7. QuestionMultiple choice

Why is cutting aluminum foil a physical change?

Please select an answer first.

Correct answer: C

The correct answer is The foil changes size and shape but remains aluminum..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Cutting changes the arrangement and dimensions of the material without creating a new substance.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Cutting changes the arrangement and dimensions of the material without creating a new substance.

8. QuestionMultiple choice

Why is rusting iron a chemical change?

Please select an answer first.

Correct answer: D

The correct answer is Iron reacts with oxygen and forms iron oxide..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Rust is a new substance with different properties from the original iron.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Rust is a new substance with different properties from the original iron.

9. QuestionMultiple choice

Which change can usually be reversed by changing temperature?

Please select an answer first.

Correct answer: A

The correct answer is Water freezing and melting.

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: Freezing and melting are changes of state and can be reversed without forming a new substance.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

Freezing and melting are changes of state and can be reversed without forming a new substance.

10. QuestionMultiple choice

What is the strongest evidence that a new substance formed?

Please select an answer first.

Correct answer: B

The correct answer is The particles now have a different chemical identity and new properties..

  1. Identify the matter change: Decide whether the substance keeps the same chemical identity or forms one or more new substances.
  2. Use the evidence: A chemical change creates one or more substances with different particle arrangements and properties.
  3. Check the particle model: A physical change rearranges or separates particles, while a chemical change creates new particle arrangements and substances.

A chemical change creates one or more substances with different particle arrangements and properties.

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