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Matter and Particles Practice Tests

These Grade 7 Science practice tests build understanding of matter, atoms, elements, compounds, mixtures, particle motion, states of matter, density, and scientific measurement.

Skills covered

  • Explaining matter using atoms, molecules, particle motion, and particle arrangement
  • Distinguishing elements, compounds, homogeneous mixtures, and heterogeneous mixtures
  • Describing solids, liquids, gases, changes of state, pressure, and temperature
  • Using mass, volume, density, units, and measurement evidence
  • Applying particle models to real laboratory and everyday situations

How to use these practice tests

For each question, identify the type of matter or change first. Then use the arrangement, motion, identity, and measurement of particles to select the best-supported answer.

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

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Grade 7 Matter and Particles Practice Tests

Practice Grade 7 Science matter and particles questions about atoms, elements, compounds, mixtures, states, density, and particle models.

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 compound?

Please select an answer first.

Correct answer: A

The correct answer is A pure substance made of two or more elements chemically bonded in fixed proportions.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Compounds contain different elements joined chemically and have properties different from their component elements.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Compounds contain different elements joined chemically and have properties different from their component elements.

2. QuestionMultiple choice

Which is a compound?

Please select an answer first.

Correct answer: B

The correct answer is Water, H2O.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Water contains hydrogen and oxygen chemically bonded in a fixed ratio, so it is a compound.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Water contains hydrogen and oxygen chemically bonded in a fixed ratio, so it is a compound.

3. QuestionMultiple choice

What is a mixture?

Please select an answer first.

Correct answer: C

The correct answer is A combination of substances that are together but not chemically bonded into one new substance.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Mixtures contain two or more substances that retain their identities and can often be separated physically.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Mixtures contain two or more substances that retain their identities and can often be separated physically.

4. QuestionMultiple choice

Which sample is a homogeneous mixture?

Please select an answer first.

Correct answer: D

The correct answer is Salt water with the same composition throughout.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A homogeneous mixture is uniform throughout, even though it contains more than one substance.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A homogeneous mixture is uniform throughout, even though it contains more than one substance.

5. QuestionMultiple choice

Which sample is a heterogeneous mixture?

Please select an answer first.

Correct answer: A

The correct answer is A salad with visibly different ingredients.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A heterogeneous mixture has regions or pieces with different compositions.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A heterogeneous mixture has regions or pieces with different compositions.

6. QuestionMultiple choice

How can sand be separated from water?

Please select an answer first.

Correct answer: B

The correct answer is Filtration.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A filter can trap the insoluble sand while water passes through.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A filter can trap the insoluble sand while water passes through.

7. QuestionMultiple choice

How can dissolved salt be recovered from salt water?

Please select an answer first.

Correct answer: C

The correct answer is Evaporation of the water.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Evaporation removes the water and leaves the salt behind.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Evaporation removes the water and leaves the salt behind.

8. QuestionMultiple choice

How can iron filings be separated from sand?

Please select an answer first.

Correct answer: D

The correct answer is Using a magnet.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Iron is attracted to a magnet while sand is not, so magnetism separates the mixture physically.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Iron is attracted to a magnet while sand is not, so magnetism separates the mixture physically.

9. QuestionMultiple choice

Why can a compound not usually be separated by simple filtering?

Please select an answer first.

Correct answer: A

The correct answer is Its elements are chemically bonded rather than merely mixed..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Physical separation methods work on mixtures; compounds require a chemical process to break bonds.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Physical separation methods work on mixtures; compounds require a chemical process to break bonds.

10. QuestionMultiple choice

What is true of the properties of a compound compared with its elements?

Please select an answer first.

Correct answer: B

The correct answer is A compound often has different properties from the elements that form it..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Chemical bonding creates a new substance with its own characteristic properties.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Chemical bonding creates a new substance with its own characteristic properties.

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