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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. Why is the vinegar and soda result different from the salt and water one?
  2. 2. What claim does this record support?
  3. 3. What happened to the salt and water?
  4. 4. What was kept the same for each pair?
2.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
  • A.A new substance has formed
  • B.The milk has frozen
  • C.Nothing has changed
3.What is the best evidence that vinegar and baking soda made something new?
  • A.It made a noise
  • B.The beaker felt full
  • C.Gas was given off and a new solid was left that does not undo
4.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.No, it is just dirty iron
  • B.No, it is paint
  • C.Yes, it is different from the iron and cannot easily be turned back
5.Which of these is a sign that mixing has made a new substance?
  • A.Bubbles of gas appear that were not there before
  • B.The beaker is clear
  • C.The mixture is stirred
6.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
7.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.Melting
  • B.Mixing that makes no new substance
  • C.A change that makes a new substance

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

Answer key — Did Mixing Make Something New?

Set 4. 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. A clear liquid formed, and the salt reappeared when dried. 4. Each pair was mixed in the same size beaker.
  2. 2.A new substance has formed
  3. 3.Gas was given off and a new solid was left that does not undo
  4. 4.Yes, it is different from the iron and cannot easily be turned back
  5. 5.Bubbles of gas appear that were not there before
  6. 6.No, the salt was there all along
  7. 7.Mixing that makes no new substance

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