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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 17 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. Why is the vinegar and soda result different from the salt and water one?
  2. 2. What claim does this record support?
  3. 3. Which mixtures could be undone?
  4. 4. What would you look for to tell a new substance had formed?
2.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
3.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
  • A.The milk has frozen
  • B.Nothing has changed
  • C.A new substance has formed
4.A mixture gets warm by itself when two liquids are poured together. What might that show?
  • A.The room is warm
  • B.A change has happened that may have made a new substance
  • C.The beaker is broken
5.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
6.Sugar is stirred into tea and vanishes. A student says a new substance formed. What is wrong?
  • A.The sugar has only dissolved, and it is still there
  • B.Nothing is wrong
  • C.Sugar always makes new substances
7.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

LessonPrint · 5-PS1-4 · Set 17 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 17. Prints on its own sheet.

  1. 1.1. The vinegar and soda gave off gas and left a new solid, which cannot be undone. 2. Mixing some substances makes new substances and mixing others does not. 3. Sand and water, and salt and water. 4. Gas given off, or a solid left that does not undo.
  2. 2.Yes, it is different from the iron and cannot easily be turned back
  3. 3.A new substance has formed
  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.The sugar has only dissolved, and it is still there
  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.