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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 density?

Please select an answer first.

Correct answer: A

The correct answer is The amount of mass in a given volume.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Density describes how tightly matter is packed and can be calculated as mass divided by volume.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Density describes how tightly matter is packed and can be calculated as mass divided by volume.

2. QuestionMultiple choice

A block has a mass of 60 grams and a volume of 20 cubic centimeters. What is its density?

Please select an answer first.

Correct answer: B

The correct answer is 3 grams per cubic centimeter.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Density equals mass divided by volume: 60 grams ÷ 20 cubic centimeters = 3 grams per cubic centimeter.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Density equals mass divided by volume: 60 grams ÷ 20 cubic centimeters = 3 grams per cubic centimeter.

3. QuestionMultiple choice

Why does a less dense object float in a denser liquid?

Please select an answer first.

Correct answer: C

The correct answer is The liquid can provide enough upward force to support the object..

  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 floats when its average density is lower than the liquid and the upward buoyant force balances its weight.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

An object floats when its average density is lower than the liquid and the upward buoyant force balances its weight.

4. QuestionMultiple choice

A student measures the volume of an irregular rock by water displacement. What is measured?

Please select an answer first.

Correct answer: D

The correct answer is The change in water level equals the rock's volume..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: The displaced water volume is used to find the volume of an irregular solid.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

The displaced water volume is used to find the volume of an irregular solid.

5. QuestionMultiple choice

What happens to the density of a fixed amount of matter if its volume increases while mass stays the same?

Please select an answer first.

Correct answer: A

The correct answer is Its density decreases..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Because density is mass divided by volume, increasing volume with constant mass lowers the density.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Because density is mass divided by volume, increasing volume with constant mass lowers the density.

6. QuestionMultiple choice

Why does a sealed balloon become more dense when its gas is cooled without losing gas?

Please select an answer first.

Correct answer: B

The correct answer is The same mass of gas occupies less volume..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Cooling can reduce gas volume while the amount of matter remains the same, increasing mass per volume.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Cooling can reduce gas volume while the amount of matter remains the same, increasing mass per volume.

7. QuestionMultiple choice

Which measurement is a physical property of a sample?

Please select an answer first.

Correct answer: C

The correct answer is Its boiling point.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Boiling point can be measured without changing the sample into a different substance.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Boiling point can be measured without changing the sample into a different substance.

8. QuestionMultiple choice

Why should a measuring tool be read at eye level?

Please select an answer first.

Correct answer: D

The correct answer is It reduces viewing-angle error and improves measurement accuracy..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Reading at eye level helps align the scale and the meniscus or object position correctly.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Reading at eye level helps align the scale and the meniscus or object position correctly.

9. QuestionMultiple choice

What does precision describe in measurement?

Please select an answer first.

Correct answer: A

The correct answer is How closely repeated measurements agree with one another.

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: Precision concerns consistency among repeated measurements, while accuracy concerns closeness to the accepted value.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

Precision concerns consistency among repeated measurements, while accuracy concerns closeness to the accepted value.

10. QuestionMultiple choice

Why are units important when reporting a measurement?

Please select an answer first.

Correct answer: B

The correct answer is Units identify what quantity and scale the number represents..

  1. Identify the particle idea: Determine whether the question concerns atoms, elements, compounds, mixtures, states, motion, or measurement.
  2. Use the particle model: A value such as 20 could describe grams, milliliters, or centimeters unless its unit is given.
  3. Check the evidence: Connect the visible property or measurement to the arrangement, motion, or identity of the particles.

A value such as 20 could describe grams, milliliters, or centimeters unless its unit is given.

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