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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.

Set 19 of 25 · the same problems every time you open this link.

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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 happened to the salt and water?
  3. 3. What claim does this record support?
  4. 4. Which mixtures could be undone?
2.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
  • A.The milk has frozen
  • B.A new substance has formed
  • C.Nothing has changed
3.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.No, it is paint
  • B.No, it is just dirty iron
  • C.Yes, it is different from the iron and cannot easily be turned back
4.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
5.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
6.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.Mixing that makes no new substance
  • B.Melting
  • C.A change that makes a new substance
7.Why mix each pair in the same size beaker?
  • A.So the beakers stay clean
  • B.Because bigger beakers make new substances
  • C.So the mixtures can be compared fairly

LessonPrint · 5-PS1-4 · Set 19 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 19. Prints on its own sheet.

  1. 1.1. It fizzed, gas was given off and a new solid was left. 2. A clear liquid formed, and the salt reappeared when dried. 3. Mixing some substances makes new substances and mixing others does not. 4. Sand and water, and salt and water.
  2. 2.A new substance has formed
  3. 3.Yes, it is different from the iron and cannot easily be turned back
  4. 4.A change has happened that may have made a new substance
  5. 5.Gas was given off and a new solid was left that does not undo
  6. 6.Mixing that makes no new substance
  7. 7.So the mixtures can be compared fairly

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