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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 would you look for to tell a new substance had formed?
  2. 2. Why is the vinegar and soda result different from the salt and water one?
  3. 3. Which mixtures could be undone?
  4. 4. What was kept the same for each pair?
2.Sand settles to the bottom of water and can be poured off unchanged. What kind of mixing is that?
  • A.A change that makes a new substance
  • B.Melting
  • C.Mixing that makes no new substance
3.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.No, it is paint
  • B.Yes, it is different from the iron and cannot easily be turned back
  • C.No, it is just dirty iron
4.Sugar is stirred into tea and vanishes. A student says a new substance formed. What is wrong?
  • A.Nothing is wrong
  • B.The sugar has only dissolved, and it is still there
  • C.Sugar always makes new substances
5.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
6.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
7.Why mix each pair in the same size beaker?
  • A.Because bigger beakers make new substances
  • B.So the mixtures can be compared fairly
  • C.So the beakers stay clean

LessonPrint · 5-PS1-4 · Set 7 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 7. Prints on its own sheet.

  1. 1.1. Gas given off, or a solid left that does not undo. 2. The vinegar and soda gave off gas and left a new solid, which cannot be undone. 3. Sand and water, and salt and water. 4. Each pair was mixed in the same size beaker.
  2. 2.Mixing that makes no new substance
  3. 3.Yes, it is different from the iron and cannot easily be turned back
  4. 4.The sugar has only dissolved, and it is still there
  5. 5.A change has happened that may have made a new substance
  6. 6.A new substance has formed
  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.