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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

A sealed container holds ice and liquid water at the same time. What is true?

Please select an answer first.

Correct answer: A

The correct answer is Both forms are made of the same water particles..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A change of state changes particle arrangement and motion but not the chemical identity of water.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A change of state changes particle arrangement and motion but not the chemical identity of water.

2. QuestionMultiple choice

A student observes that a sample takes the shape of its container but keeps nearly the same volume. What state is it?

Please select an answer first.

Correct answer: B

The correct answer is Liquid.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Liquids flow to fit a container while their particles remain close enough to keep a nearly fixed volume.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Liquids flow to fit a container while their particles remain close enough to keep a nearly fixed volume.

3. QuestionMultiple choice

A sample expands to fill every part of its container. What state is it?

Please select an answer first.

Correct answer: C

The correct answer is Gas.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Gas particles spread through the available space and do not maintain a fixed shape or volume.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Gas particles spread through the available space and do not maintain a fixed shape or volume.

4. QuestionMultiple choice

A student mixes two clear liquids and observes a solid forming. What is the best conclusion?

Please select an answer first.

Correct answer: D

The correct answer is A chemical reaction may have produced a precipitate..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A new solid precipitate is evidence that dissolved particles formed a new substance.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A new solid precipitate is evidence that dissolved particles formed a new substance.

5. QuestionMultiple choice

A closed sample is crushed into powder. Which statement is correct?

Please select an answer first.

Correct answer: A

The correct answer is The sample has a different size and shape but the same total mass and chemical identity..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Crushing is a physical change that alters form without changing the substance or total mass.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Crushing is a physical change that alters form without changing the substance or total mass.

6. QuestionMultiple choice

A mixture contains iron filings, sand, and salt. Which order can separate all three components?

Please select an answer first.

Correct answer: B

The correct answer is Use a magnet, dissolve the salt in water, then filter and evaporate..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Magnetism removes iron, dissolving separates salt from sand, filtration removes sand, and evaporation recovers salt.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Magnetism removes iron, dissolving separates salt from sand, filtration removes sand, and evaporation recovers salt.

7. QuestionMultiple choice

Why can water vapor and liquid water be considered the same substance?

Please select an answer first.

Correct answer: C

The correct answer is Their particles are the same water molecules arranged and moving differently..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: State changes alter spacing and motion, not the molecular identity of water.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

State changes alter spacing and motion, not the molecular identity of water.

8. QuestionMultiple choice

A metal cube sinks in water but floats in a denser liquid. What does this show?

Please select an answer first.

Correct answer: D

The correct answer is The cube is denser than water but less dense than the other liquid..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: An object sinks in liquids less dense than itself and floats in liquids denser than itself.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

An object sinks in liquids less dense than itself and floats in liquids denser than itself.

9. QuestionMultiple choice

Which model best represents a pure element?

Please select an answer first.

Correct answer: A

The correct answer is Many identical particles made from the same type of atom.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A pure element contains one kind of atom, even if those atoms are connected into molecules.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A pure element contains one kind of atom, even if those atoms are connected into molecules.

10. QuestionMultiple choice

Which model best represents a compound?

Please select an answer first.

Correct answer: B

The correct answer is Repeating particles made from two or more kinds of atoms chemically joined in the same ratio.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A compound has a fixed chemical composition and repeating units containing different bonded elements.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A compound has a fixed chemical composition and repeating units containing different bonded elements.

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