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Grade 5 Science · Conservation of Matter

Grade 5 Conservation of Matter Practice Test

Build Grade 5 Science skills with five 10-question practice tests on closed systems, mass, physical and chemical changes, particle models, and scientific evidence.

Conservation of Matter Practice Tests

These Grade 5 Science practice tests help students track matter during physical changes, chemical reactions, and mixtures. Students use closed systems, mass measurements, particle models, and observations to explain why matter is rearranged rather than created or destroyed.

Skills covered

  • Explaining conservation of matter in closed systems
  • Comparing mass before and after physical changes
  • Tracking gases during evaporation and chemical reactions
  • Distinguishing rearrangement from creation or destruction
  • Using particle models to represent changes
  • Planning fair measurements and repeated trials
  • Connecting observations and data to scientific conclusions

How to use these practice tests

First identify the system boundary and decide whether matter can enter or leave. Then track solids, liquids, and gases, compare measurements, and use observations to explain what happened during the change.

For more Grade 5 Science practice, return to the Grade 5 Science category.

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Grade 5 Conservation of Matter Practice Tests

A 10-question Grade 5 Science practice test on conservation of matter, closed systems, mass, physical and chemical changes, particles, and scientific evidence.

Track the matter in each system, decide whether the system is closed, and use measurements or observations to select the best explanation.

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

Which system is closed for a mass investigation?

Please select an answer first.

Correct answer: A

The correct answer is A sealed flask with a stopper that prevents matter from entering or leaving..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: A sealed flask keeps matter inside so the system boundary is clear.
  3. Choose the evidence-based answer: The correct choice is A sealed flask with a stopper that prevents matter from entering or leaving..

A sealed flask keeps matter inside so the system boundary is clear.

2. QuestionMultiple choice

What is the independent variable in an investigation comparing open and sealed containers?

Please select an answer first.

Correct answer: B

The correct answer is Whether the container is open or sealed..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The independent variable is the condition intentionally changed between groups.
  3. Choose the evidence-based answer: The correct choice is Whether the container is open or sealed..

The independent variable is the condition intentionally changed between groups.

3. QuestionMultiple choice

What is the dependent variable in a mass conservation investigation?

Please select an answer first.

Correct answer: C

The correct answer is The measured mass of the system after the change..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The dependent variable is the measurement recorded as the result.
  3. Choose the evidence-based answer: The correct choice is The measured mass of the system after the change..

The dependent variable is the measurement recorded as the result.

4. QuestionMultiple choice

Which practice makes a mass comparison more reliable?

Please select an answer first.

Correct answer: D

The correct answer is Use the same balance and repeat measurements under the same conditions..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Consistent equipment and repeated trials reduce measurement error and improve reliability.
  3. Choose the evidence-based answer: The correct choice is Use the same balance and repeat measurements under the same conditions..

Consistent equipment and repeated trials reduce measurement error and improve reliability.

5. QuestionMultiple choice

A sealed system has a mass of 120 grams before a reaction. What should its mass be after the reaction if no matter escapes?

Please select an answer first.

Correct answer: A

The correct answer is About 120 grams.

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Conservation of matter means the total mass remains about the same in a closed system.
  3. Choose the evidence-based answer: The correct choice is About 120 grams.

Conservation of matter means the total mass remains about the same in a closed system.

6. QuestionMultiple choice

A student measures 50 grams before and 49 grams after a sealed change. What is the best explanation?

Please select an answer first.

Correct answer: B

The correct answer is The small difference may come from measurement uncertainty or a tiny leak that should be investigated..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Small differences can result from measurement limits or system problems and require investigation.
  3. Choose the evidence-based answer: The correct choice is The small difference may come from measurement uncertainty or a tiny leak that should be investigated..

Small differences can result from measurement limits or system problems and require investigation.

7. QuestionMultiple choice

Which data table is most useful for a conservation investigation?

Please select an answer first.

Correct answer: C

The correct answer is Trial number, initial mass, final mass, container type, and observations..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The table records the measurements, conditions, and observations needed to analyze the results.
  3. Choose the evidence-based answer: The correct choice is Trial number, initial mass, final mass, container type, and observations..

The table records the measurements, conditions, and observations needed to analyze the results.

8. QuestionMultiple choice

Which conclusion is supported by equal mass measurements in three sealed trials?

Please select an answer first.

Correct answer: D

The correct answer is The results support the idea that matter was conserved under the tested conditions..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The conclusion matches repeated evidence while limiting the claim to the conditions tested.
  3. Choose the evidence-based answer: The correct choice is The results support the idea that matter was conserved under the tested conditions..

The conclusion matches repeated evidence while limiting the claim to the conditions tested.

9. QuestionMultiple choice

Why should a student record unexpected bubbles or a temperature change?

Please select an answer first.

Correct answer: A

The correct answer is They may be evidence that a chemical reaction occurred and help explain the results..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Unexpected observations can provide clues about reactions and should be included with the data.
  3. Choose the evidence-based answer: The correct choice is They may be evidence that a chemical reaction occurred and help explain the results..

Unexpected observations can provide clues about reactions and should be included with the data.

10. QuestionMultiple choice

Which statement best connects conservation of matter to everyday life?

Please select an answer first.

Correct answer: B

The correct answer is When food cooks, burns, or changes state, its matter is rearranged into other forms rather than disappearing..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Everyday changes also rearrange matter, even when the products are difficult to see.
  3. Choose the evidence-based answer: The correct choice is When food cooks, burns, or changes state, its matter is rearranged into other forms rather than disappearing..

Everyday changes also rearrange matter, even when the products are difficult to see.

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Frequently asked questions about Grade 5 Conservation of Matter

What does conservation of matter mean?

Matter is not created or destroyed during a change; it can be rearranged or change form, especially when all matter is included in a closed system.

Why are closed systems useful in experiments?

A closed system keeps matter from entering or leaving, so scientists can compare the total mass before and after a change.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 5 Conservation of Matter questions in total.