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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 to the salt and water?
  2. 2. What happened when vinegar and soda were mixed?
  3. 3. Which mixtures could be undone?
  4. 4. What would you look for to tell a new substance had formed?
2.Which of these is a sign that mixing has made a new substance?
  • A.The mixture is stirred
  • B.Bubbles of gas appear that were not there before
  • C.The beaker is clear
3.A mixture gets warm by itself when two liquids are poured together. What might that show?
  • A.The beaker is broken
  • B.The room is warm
  • C.A change has happened that may have made a new substance
4.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.No, it is just dirty iron
  • B.Yes, it is different from the iron and cannot easily be turned back
  • C.No, it is paint
5.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
6.Why mix each pair in the same size beaker?
  • A.So the mixtures can be compared fairly
  • B.So the beakers stay clean
  • C.Because bigger beakers make new substances
7.What is the best evidence that vinegar and baking soda made something new?
  • A.Gas was given off and a new solid was left that does not undo
  • B.The beaker felt full
  • C.It made a noise

LessonPrint · 5-PS1-4 · Set 12 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 12. Prints on its own sheet.

  1. 1.1. A clear liquid formed, and the salt reappeared when dried. 2. It fizzed, gas was given off and a new solid was left. 3. Sand and water, and salt and water. 4. Gas given off, or a solid left that does not undo.
  2. 2.Bubbles of gas appear that were not there before
  3. 3.A change has happened that may have made a new substance
  4. 4.Yes, it is different from the iron and cannot easily be turned back
  5. 5.Whether the change can be undone, to see if a new substance formed
  6. 6.So the mixtures can be compared fairly
  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.