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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 was kept the same for each pair?
  2. 2. What would you look for to tell a new substance had formed?
  3. 3. What happened when vinegar and soda were mixed?
  4. 4. What claim does this record support?
2.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Which beaker is prettiest
  • B.Whether the change can be undone, to see if a new substance formed
  • C.Nothing, color proves nothing
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.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
5.Salt dissolves in water and comes back when the water dries. Was a new substance made?
  • A.No, the salt was there all along
  • B.Yes, the water made salt
  • C.Yes, because it disappeared
6.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
7.Which of these is a sign that mixing has made a new substance?
  • A.The mixture is stirred
  • B.The beaker is clear
  • C.Bubbles of gas appear that were not there before

LessonPrint · 5-PS1-4 · Set 23 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 23. Prints on its own sheet.

  1. 1.1. Each pair was mixed in the same size beaker. 2. Gas given off, or a solid left that does not undo. 3. It fizzed, gas was given off and a new solid was left. 4. Mixing some substances makes new substances and mixing others does not.
  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.A change has happened that may have made a new substance
  5. 5.No, the salt was there all along
  6. 6.Mixing that makes no new substance
  7. 7.Bubbles of gas appear that were not there before

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