MAKE IT YOURS

A world for every learner

Choose a grade to discover its colours and creative world.

Grade 5 Conservation of Mass Worksheet with Answers

Grade 5 (US) · Year 6 (UK) · Class 5 (India) · Science

Unit 1: Structure & Properties of MatterConservation of MassNGSS 5-PS1-2

In mixing, dissolving and reactions in a closed system, total mass stays the same. This free upper elementary worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

Save to PinterestJump to answer key
  • Answer keys checked by code
  • No ads, ever
  • No student accounts needed
  • Safety & privacy
Practice Sheetaethelsystems.com

Conservation of Mass

Grade 5 · Science

Score___ / 12

Name

Class

Date

Learning goal: Conservation of Mass · NGSS 5-PS1-2

Directions: Read each question carefully and write your answer on the line.

Example

46 g of salt is dissolved in 108 g of water. What is the mass of the salt water?

Answer: 154 g

RememberConservation of mass

Before: 50 g + 20 g= 70 greactionAfter: products= 70 gMass is never created or destroyed: total mass before = total mass after.
  1. 1

    In a sealed container, 29 g of one substance reacts with 50 g of another. What is the total mass of the products?

  2. 2

    In a sealed container, 9 g of one substance reacts with 18 g of another. What is the total mass of the products?

  3. 3

    A 33 g ice cube melts completely in a sealed bag. What is the mass of the water?

  4. 4

    A 43 g ice cube melts completely in a sealed bag. What is the mass of the water?

  5. 5

    In a sealed container, 8 g of one substance reacts with 18 g of another. What is the total mass of the products?

  6. 6

    A 32 g ice cube melts completely in a sealed bag. What is the mass of the water?

  7. 7

    46 g of salt is dissolved in 16 g of water. What is the mass of the salt water?

  8. 8

    A 8 g ice cube melts completely in a sealed bag. What is the mass of the water?

  9. 9

    A 42 g ice cube melts completely in a sealed bag. What is the mass of the water?

  10. 10

    In a sealed container, 9 g of one substance reacts with 14 g of another. What is the total mass of the products?

  11. 11

    14 g of salt is dissolved in 104 g of water. What is the mass of the salt water?

  12. 12

    A 53 g ice cube melts completely in a sealed bag. What is the mass of the water?

★ Challenge corner for fast finishers

I can't be seen, but without me a fire goes out. What am I?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/5/conservation_mass

Answer key (click to show)
  1. 1.79 g
  2. 2.27 g
  3. 3.33 g
  4. 4.43 g
  5. 5.26 g
  6. 6.32 g
  7. 7.62 g
  8. 8.8 g
  9. 9.42 g
  10. 10.23 g
  11. 11.118 g
  12. 12.53 g
  13. ★oxygen (challenge corner)

Need another Conservation of Mass worksheet?

Generate unlimited fresh versions at easy, medium or hard difficulty, each with its own answer key. Free during our launch — no card needed.

Create a free account

How to use this worksheet

  • Use it as a 10–15 minute warm-up or homework task rather than a long drill.
  • Ask students to show their working so you can see where a mistake started, not just that it happened.
  • Mark it with the answer key together, then print a fresh version of the same topic to practise the questions they missed.

Related worksheets

Conservation of Mass at other grades

Grade 8

More Grade 5 Science worksheets

Grade 5 Matter: Particles, Mixtures & SolutionsGrade 5 States of MatterGrade 5 GravityGrade 5 Stars, Shadows & Earth's RotationGrade 5 PlanetsGrade 5 Earth, Sun & MoonGrade 5 Solar System (Mixed)Grade 5 Plants Make Food: Energy from the Sun

Guides for teaching Conservation of Mass

Moon Phases Explained: Why the Moon Changes ShapeThe moon never stops being lit — we just see different amounts of its sunlit half. The eight phases, a lamp-and-ball demo, and the misconception almost everyone has.What Are the Common Core and NGSS Standards? A Parent's GuideWhat learning standards are, how to read a code like 3.NF.A.1 or MS-PS1-2, what each grade covers in Math, English and Science, and how to use them at home.How the Circulatory System Works: A Guide for Grades 5–8The heart, blood and blood vessels in plain language — the path blood takes, what each part does, and the questions students most often get wrong.

Can't find what you need? Tell us which worksheet to make next.

Frequently asked questions

Does this Grade 5 Conservation of Mass worksheet come with answers?

Yes. The full answer key is on this page, and it prints on its own page after the questions. Every answer is calculated or checked by code rather than written by an AI model, so the key is always correct.

How do I print it or save it as a PDF?

Click "Download PDF" to save a ready-to-print PDF with the answer key on the last page, or click "Print" to send the worksheet and answer key straight to your printer.

Can I get a different Conservation of Mass worksheet?

Yes. Create a free account to generate as many fresh Grade 5 Conservation of Mass worksheets as you like, at easy, medium or hard difficulty, each with its own answer key.

Is this worksheet free?

Yes. This worksheet is free to print, and Practice Sheet is free to use during our launch with no card needed.