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Did Mixing Make Something New? is a free printable Grade 5 science worksheet on using mixing results as evidence of whether a new substance formed, aligned to NGSS performance expectation 5-PS1-4. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Did Mixing Make Something New?

5-PS1-4

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Did Mixing Make Something New?

Observations from mixing four pairs of substances, with the mixture left for ten minutes. WHAT HAPPENED WHEN MIXED Sand and water .......... sand settles out again unchanged Salt and water .......... clear liquid; salt reappears when dried Vinegar and soda ........ fizzes, gas given off, new solid left Milk and lemon juice .... thickens into lumps that do not undo Each pair was mixed in the same size beaker.

  1. 1. What would you look for to tell a new substance had formed?
  2. 2. Which mixtures could be undone?
  3. 3. What happened to the salt and water?
  4. 4. Why is the vinegar and soda result different from the salt and water one?
2.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
  • A.Nothing has changed
  • B.The milk has frozen
  • C.A new substance has formed
3.Salt dissolves in water and comes back when the water dries. Was a new substance made?
  • A.Yes, the water made salt
  • B.No, the salt was there all along
  • C.Yes, because it disappeared
4.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Nothing, color proves nothing
  • B.Which beaker is prettiest
  • C.Whether the change can be undone, to see if a new substance formed
5.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.Melting
  • B.Mixing that makes no new substance
  • C.A change that makes a new substance
6.A mixture gets warm by itself when two liquids are poured together. What might that show?
  • A.A change has happened that may have made a new substance
  • B.The room is warm
  • C.The beaker is broken
7.What is the best evidence that vinegar and baking soda made something new?
  • A.The beaker felt full
  • B.Gas was given off and a new solid was left that does not undo
  • C.It made a noise

LessonPrint · 5-PS1-4 · Set 13 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 13. Prints on its own sheet.

  1. 1.1. Gas given off, or a solid left that does not undo. 2. Sand and water, and salt and water. 3. A clear liquid formed, and the salt reappeared when dried. 4. The vinegar and soda gave off gas and left a new solid, which cannot be undone.
  2. 2.A new substance has formed
  3. 3.No, the salt was there all along
  4. 4.Whether the change can be undone, to see if a new substance formed
  5. 5.Mixing that makes no new substance
  6. 6.A change has happened that may have made a new substance
  7. 7.Gas was given off and a new solid was left that does not undo

Last reviewed 2026-09-05. Aligned to 5-PS1-4 of the Next Generation Science Standards.