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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 happened when vinegar and soda were mixed?
  2. 2. What would you look for to tell a new substance had formed?
  3. 3. Why is the vinegar and soda result different from the salt and water one?
  4. 4. What happened to the salt and water?
2.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
3.What is the best evidence that vinegar and baking soda made something new?
  • A.It made a noise
  • B.Gas was given off and a new solid was left that does not undo
  • C.The beaker felt full
4.Sugar is stirred into tea and vanishes. A student says a new substance formed. What is wrong?
  • A.Sugar always makes new substances
  • B.The sugar has only dissolved, and it is still there
  • C.Nothing is wrong
5.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.Melting
  • C.Mixing that makes no new substance
6.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
7.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Which beaker is prettiest
  • B.Nothing, color proves nothing
  • C.Whether the change can be undone, to see if a new substance formed

LessonPrint · 5-PS1-4 · Set 22 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 22. Prints on its own sheet.

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

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