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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.

Set 3 of 25 · the same problems every time you open this link.

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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 was kept the same for each pair?
  2. 2. Which mixtures could be undone?
  3. 3. What happened when vinegar and soda were mixed?
  4. 4. What claim does this record support?
2.Salt dissolves in water and comes back when the water dries. Was a new substance made?
  • A.Yes, because it disappeared
  • B.Yes, the water made salt
  • C.No, the salt was there all along
3.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
4.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
5.Sugar is stirred into tea and vanishes. A student says a new substance formed. What is wrong?
  • A.The sugar has only dissolved, and it is still there
  • B.Nothing is wrong
  • C.Sugar always makes new substances
6.Why mix each pair in the same size beaker?
  • A.So the beakers stay clean
  • B.Because bigger beakers make new substances
  • C.So the mixtures can be compared fairly
7.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

LessonPrint · 5-PS1-4 · Set 3 · free to copy for classroom use

Answer key — Did Mixing Make Something New?

Set 3. Prints on its own sheet.

  1. 1.1. Each pair was mixed in the same size beaker. 2. Sand and water, and salt and water. 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.No, the salt was there all along
  3. 3.A new substance has formed
  4. 4.A change has happened that may have made a new substance
  5. 5.The sugar has only dissolved, and it is still there
  6. 6.So the mixtures can be compared fairly
  7. 7.Yes, it is different from the iron and cannot easily be turned back

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