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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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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

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. What claim does this record support?
  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.Nothing, color proves nothing
  • B.Whether the change can be undone, to see if a new substance formed
  • C.Which beaker is prettiest
3.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
4.Iron left wet turns into orange rust. Is the rust a new substance?
  • A.No, it is paint
  • B.No, it is just dirty iron
  • C.Yes, it is different from the iron and cannot easily be turned back
5.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
6.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
7.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

LessonPrint · 5-PS1-4 · Set 2 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 2. Prints on its own sheet.

  1. 1.1. A clear liquid formed, and the salt reappeared when dried. 2. Mixing some substances makes new substances and mixing others does not. 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.A change has happened that may have made a new substance
  4. 4.Yes, it is different from the iron and cannot easily be turned back
  5. 5.No, the salt was there all along
  6. 6.Mixing that makes no new substance
  7. 7.The sugar has only dissolved, and it is still there

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