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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 when a puddle evaporates into the air?

Please select an answer first.

Correct answer: A

The correct answer is The water changes from liquid to gas and spreads into the surrounding air..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Evaporation changes the state and location of water particles; the matter still exists as water vapor.
  3. Choose the evidence-based answer: The correct choice is The water changes from liquid to gas and spreads into the surrounding air..

Evaporation changes the state and location of water particles; the matter still exists as water vapor.

2. QuestionMultiple choice

How could a student show that evaporated water is still present?

Please select an answer first.

Correct answer: B

The correct answer is Collect the water vapor by cooling it so it condenses into liquid droplets..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Condensing the vapor into droplets provides observable evidence that the water remained matter.
  3. Choose the evidence-based answer: The correct choice is Collect the water vapor by cooling it so it condenses into liquid droplets..

Condensing the vapor into droplets provides observable evidence that the water remained matter.

3. QuestionMultiple choice

A sealed bottle contains liquid water and air. The bottle is cooled and droplets form inside. What happened?

Please select an answer first.

Correct answer: C

The correct answer is Water vapor condensed into liquid water on the bottle surface..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Cooling caused some water vapor to lose energy and become liquid droplets.
  3. Choose the evidence-based answer: The correct choice is Water vapor condensed into liquid water on the bottle surface..

Cooling caused some water vapor to lose energy and become liquid droplets.

4. QuestionMultiple choice

Why might an open beaker have less mass after water boils?

Please select an answer first.

Correct answer: D

The correct answer is Water vapor escaped into the air outside the measured system..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The water is still present as vapor, but it is no longer inside the open beaker being weighed.
  3. Choose the evidence-based answer: The correct choice is Water vapor escaped into the air outside the measured system..

The water is still present as vapor, but it is no longer inside the open beaker being weighed.

5. QuestionMultiple choice

Which setup would give the strongest evidence about the mass of water during evaporation?

Please select an answer first.

Correct answer: A

The correct answer is Weigh a sealed container with water before and after evaporation occurs inside it..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The sealed setup keeps the vapor inside and allows a fair mass comparison.
  3. Choose the evidence-based answer: The correct choice is Weigh a sealed container with water before and after evaporation occurs inside it..

The sealed setup keeps the vapor inside and allows a fair mass comparison.

6. QuestionMultiple choice

What happens to the total matter when a candle burns in a sealed container with enough oxygen?

Please select an answer first.

Correct answer: B

The correct answer is The wax and oxygen are rearranged into new substances such as gases and other products..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Burning is a chemical reaction that rearranges atoms from the wax and oxygen into products.
  3. Choose the evidence-based answer: The correct choice is The wax and oxygen are rearranged into new substances such as gases and other products..

Burning is a chemical reaction that rearranges atoms from the wax and oxygen into products.

7. QuestionMultiple choice

Why may the solid wax left after a candle burns have less mass?

Please select an answer first.

Correct answer: C

The correct answer is Some wax matter has become gases that are still in the container or may have escaped..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: The wax is converted into gaseous products, so the remaining solid wax has less mass.
  3. Choose the evidence-based answer: The correct choice is Some wax matter has become gases that are still in the container or may have escaped..

The wax is converted into gaseous products, so the remaining solid wax has less mass.

8. QuestionMultiple choice

Which observation is not enough by itself to prove that matter was destroyed?

Please select an answer first.

Correct answer: D

The correct answer is The solid amount looks smaller after a reaction in an open container..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: A smaller solid amount may mean matter became gas or left the open container; it does not prove destruction.
  3. Choose the evidence-based answer: The correct choice is The solid amount looks smaller after a reaction in an open container..

A smaller solid amount may mean matter became gas or left the open container; it does not prove destruction.

9. QuestionMultiple choice

What should a student include when comparing water before and after boiling?

Please select an answer first.

Correct answer: A

The correct answer is The amount of water, the container conditions, and the measurements taken before and after..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: Careful conditions and measurements help explain state change and track the matter.
  3. Choose the evidence-based answer: The correct choice is The amount of water, the container conditions, and the measurements taken before and after..

Careful conditions and measurements help explain state change and track the matter.

10. QuestionMultiple choice

Which model best represents evaporation?

Please select an answer first.

Correct answer: B

The correct answer is The same water particles are farther apart and moving through the air as a gas..

  1. Identify the system: Decide whether the matter is in a closed system and what change or reaction occurred.
  2. Track the matter: A particle model shows that matter remains while particle spacing and motion change.
  3. Choose the evidence-based answer: The correct choice is The same water particles are farther apart and moving through the air as a gas..

A particle model shows that matter remains while particle spacing and motion change.

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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.