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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. What claim does this record support?
  3. 3. What happened to the salt and water?
  4. 4. What would you look for to tell a new substance had formed?
2.A mixture gets warm by itself when two liquids are poured together. What might that show?
  • A.The room is warm
  • B.The beaker is broken
  • C.A change has happened that may have made a new substance
3.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Which beaker is prettiest
  • B.Whether the change can be undone, to see if a new substance formed
  • C.Nothing, color proves nothing
4.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.It made a noise
  • C.The beaker felt full
5.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.Melting
  • B.A change that makes a new substance
  • C.Mixing that makes no new substance
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.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

LessonPrint · 5-PS1-4 · Set 11 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 11. Prints on its own sheet.

  1. 1.1. Each pair was mixed in the same size beaker. 2. Mixing some substances makes new substances and mixing others does not. 3. A clear liquid formed, and the salt reappeared when dried. 4. Gas given off, or a solid left that does not undo.
  2. 2.A change has happened that may have made a 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.Mixing that makes no new substance
  6. 6.So the mixtures can be compared fairly
  7. 7.No, the salt was there all along

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