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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 happened to the salt and water?
  2. 2. Why is the vinegar and soda result different from the salt and water one?
  3. 3. What would you look for to tell a new substance had formed?
  4. 4. What was kept the same for each pair?
2.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Whether the change can be undone, to see if a new substance formed
  • B.Nothing, color proves nothing
  • C.Which beaker is prettiest
3.Sugar is stirred into tea and vanishes. A student says a new substance formed. What is wrong?
  • A.Sugar always makes new substances
  • B.The sugar has only dissolved, and it is still there
  • C.Nothing is wrong
4.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
5.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.Yes, it is different from the iron and cannot easily be turned back
  • B.No, it is just dirty iron
  • C.No, it is paint
6.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 mixture is stirred
  • C.The beaker is clear
7.A mixture gets warm by itself when two liquids are poured together. What might that show?
  • A.A change has happened that may have made a new substance
  • B.The room is warm
  • C.The beaker is broken

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

Answer key — Did Mixing Make Something New?

Set 5. Prints on its own sheet.

  1. 1.1. A clear liquid formed, and the salt reappeared when dried. 2. The vinegar and soda gave off gas and left a new solid, which cannot be undone. 3. Gas given off, or a solid left that does not undo. 4. Each pair was mixed in the same size beaker.
  2. 2.Whether the change can be undone, to see if a new substance formed
  3. 3.The sugar has only dissolved, and it is still there
  4. 4.No, the salt was there all along
  5. 5.Yes, it is different from the iron and cannot easily be turned back
  6. 6.Bubbles of gas appear that were not there before
  7. 7.A change has happened that may have made a new substance

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