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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 claim does this record support?
  2. 2. What happened when vinegar and soda were mixed?
  3. 3. What would you look for to tell a new substance had formed?
  4. 4. Which mixtures could be undone?
2.A color change appears when two clear liquids are mixed. What should you investigate next?
  • A.Which beaker is prettiest
  • B.Nothing, color proves nothing
  • C.Whether the change can be undone, to see if a new substance formed
3.Which of these is a sign that mixing has made a new substance?
  • A.The mixture is stirred
  • B.Bubbles of gas appear that were not there before
  • C.The beaker is clear
4.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 paint
  • C.No, it is just dirty iron
5.What is the best evidence that vinegar and baking soda made something new?
  • A.The beaker felt full
  • B.Gas was given off and a new solid was left that does not undo
  • C.It made a noise
6.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
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 15 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 15. Prints on its own sheet.

  1. 1.1. Mixing some substances makes new substances and mixing others does not. 2. It fizzed, gas was given off and a new solid was left. 3. Gas given off, or a solid left that does not undo. 4. Sand and water, and salt and water.
  2. 2.Whether the change can be undone, to see if a new substance formed
  3. 3.Bubbles of gas appear that were not there before
  4. 4.Yes, it is different from the iron and cannot easily be turned back
  5. 5.Gas was given off and a new solid was left that does not undo
  6. 6.No, the salt was there all along
  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.