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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 was kept the same for each pair?
  2. 2. Which mixtures could be undone?
  3. 3. What would you look for to tell a new substance had formed?
  4. 4. What happened to the salt and water?
2.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.A change that makes a new substance
  • B.Mixing that makes no new substance
  • C.Melting
3.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Nothing, color proves nothing
  • B.Whether the change can be undone, to see if a new substance formed
  • C.Which beaker is prettiest
4.What is the best evidence that vinegar and baking soda made something new?
  • A.The beaker felt full
  • B.It made a noise
  • C.Gas was given off and a new solid was left that does not undo
5.Which of these is a sign that mixing has made a new substance?
  • A.Bubbles of gas appear that were not there before
  • B.The beaker is clear
  • C.The mixture is stirred
6.Why mix each pair in the same size beaker?
  • A.So the beakers stay clean
  • B.So the mixtures can be compared fairly
  • C.Because bigger beakers make new substances
7.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
  • A.Nothing has changed
  • B.A new substance has formed
  • C.The milk has frozen

LessonPrint · 5-PS1-4 · Set 14 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 14. Prints on its own sheet.

  1. 1.1. Each pair was mixed in the same size beaker. 2. Sand and water, and salt and water. 3. Gas given off, or a solid left that does not undo. 4. A clear liquid formed, and the salt reappeared when dried.
  2. 2.Mixing that makes no new substance
  3. 3.Whether the change can be undone, to see if a new substance formed
  4. 4.Gas was given off and a new solid was left that does not undo
  5. 5.Bubbles of gas appear that were not there before
  6. 6.So the mixtures can be compared fairly
  7. 7.A new substance has formed

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