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Grade 7 Physical & Chemical Changes Worksheet with Answers

Grade 7 (US) · Year 8 (UK) · Class 7 (India) · Science

Unit 4: Introduction to ChemistryChanges in MatterNGSS MS-PS1-2

Telling physical changes from chemical changes and recognizing signs of a reaction. This free middle school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Physical & Chemical Changes

Grade 7 · Science

Score___ / 12

Name

Class

Date

Learning goal: Changes in Matter · NGSS MS-PS1-2

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

RememberPhysical or chemical change?

Physicalsame substance, new formmelting, cutting, dissolvingChemicala new substance formsrusting, burning, bakingSigns of chemicalgas, colour change,light/heat, new smell
Part A

Physical or Chemical change? Tick one box for each.

PhysicalChemical change
1Dissolving sugar in tea
2Boiling water
3Ice melting
4Crushing a can
5Cutting paper
Part B

Answer each question. Use full sentences where you can.

  1. 6

    Physical or chemical change? A firework exploding

  2. 7

    Physical or chemical change? Wood burning

  3. 8

    Name two signs of a chemical change.

  4. 9

    Physical or chemical change? Baking bread

  5. 10

    Physical or chemical change? Milk going sour

  6. 11

    Physical or chemical change? Digesting food

  7. 12

    Physical or chemical change? Iron rusting

★ Challenge corner for fast finishers

If Earth stopped spinning, how long would one day (sunrise to sunrise) be?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/7/phys_chem_changes

Answer key (click to show)
  1. 1.physical
  2. 2.physical
  3. 3.physical
  4. 4.physical
  5. 5.physical
  6. 6.chemical
  7. 7.chemical
  8. 8.gas bubbles, color change, new smell, light or heat, precipitate (any two)
  9. 9.chemical
  10. 10.chemical
  11. 11.chemical
  12. 12.chemical
  13. ★about one year (challenge corner)

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