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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

What happens to matter during a chemical reaction?

Please select an answer first.

Correct answer: A

The correct answer is Atoms are rearranged to form new substances..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Chemical reactions rearrange atoms into products with new properties.
  3. Choose the evidence-based answer: The correct choice is Atoms are rearranged to form new substances..

Chemical reactions rearrange atoms into products with new properties.

2. QuestionMultiple choice

Which observation can suggest that a chemical reaction occurred?

Please select an answer first.

Correct answer: B

The correct answer is A new gas forms and the temperature changes during the reaction..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Gas formation and an energy change can provide evidence of a chemical reaction.
  3. Choose the evidence-based answer: The correct choice is A new gas forms and the temperature changes during the reaction..

Gas formation and an energy change can provide evidence of a chemical reaction.

3. QuestionMultiple choice

Why should a reaction be measured in a closed container when possible?

Please select an answer first.

Correct answer: C

The correct answer is The products, including gases, remain in the system for a total mass comparison..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Keeping products inside allows the student to account for all matter.
  3. Choose the evidence-based answer: The correct choice is The products, including gases, remain in the system for a total mass comparison..

Keeping products inside allows the student to account for all matter.

4. QuestionMultiple choice

A reaction in a sealed bag produces a gas and the bag expands. What does the expansion show?

Please select an answer first.

Correct answer: D

The correct answer is The products include gas particles that occupy space inside the bag..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Gas particles take up space and can make the flexible bag expand.
  3. Choose the evidence-based answer: The correct choice is The products include gas particles that occupy space inside the bag..

Gas particles take up space and can make the flexible bag expand.

5. QuestionMultiple choice

Which statement about reactants and products is correct?

Please select an answer first.

Correct answer: A

The correct answer is Reactants change into products, but the total matter of the closed system stays the same..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: A reaction changes the arrangement of matter from reactants to products while conserving total matter.
  3. Choose the evidence-based answer: The correct choice is Reactants change into products, but the total matter of the closed system stays the same..

A reaction changes the arrangement of matter from reactants to products while conserving total matter.

6. QuestionMultiple choice

A student mixes two clear liquids in a sealed container. A solid appears. What is the solid?

Please select an answer first.

Correct answer: B

The correct answer is A new product formed by the reaction..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: A new solid appearing is evidence that the substances reacted and formed a product.
  3. Choose the evidence-based answer: The correct choice is A new product formed by the reaction..

A new solid appearing is evidence that the substances reacted and formed a product.

7. QuestionMultiple choice

Which evidence would show that the new solid did not make extra matter from nothing?

Please select an answer first.

Correct answer: C

The correct answer is The total mass of the sealed container is the same before and after the reaction..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Equal total mass shows that the solid product came from matter already in the reactants.
  3. Choose the evidence-based answer: The correct choice is The total mass of the sealed container is the same before and after the reaction..

Equal total mass shows that the solid product came from matter already in the reactants.

8. QuestionMultiple choice

Why can a chemical reaction seem to lose mass when measured in an open container?

Please select an answer first.

Correct answer: D

The correct answer is A gas product may escape before the final mass is measured..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The mass may leave the open system as gas, even though matter is conserved overall.
  3. Choose the evidence-based answer: The correct choice is A gas product may escape before the final mass is measured..

The mass may leave the open system as gas, even though matter is conserved overall.

9. QuestionMultiple choice

Which particle statement is accurate after a chemical reaction?

Please select an answer first.

Correct answer: A

The correct answer is The particles have been rearranged into new combinations with new properties..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Chemical reactions change particle combinations, which produces substances with new properties.
  3. Choose the evidence-based answer: The correct choice is The particles have been rearranged into new combinations with new properties..

Chemical reactions change particle combinations, which produces substances with new properties.

10. QuestionMultiple choice

Which question would help investigate conservation during a reaction?

Please select an answer first.

Correct answer: B

The correct answer is Does the total mass of a sealed system stay the same before and after the reaction?.

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The question directly tests conservation using measurable evidence in a closed system.
  3. Choose the evidence-based answer: The correct choice is Does the total mass of a sealed system stay the same before and after the reaction?.

The question directly tests conservation using measurable evidence in a closed system.

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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.