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 1 of 25 · the same problems every time you open this link.
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. Why is the vinegar and soda result different from the salt and water one?
2. What would you look for to tell a new substance had formed?
3. What happened to the salt and water?
4. What happened when vinegar and soda were mixed?
2.Milk and lemon juice form lumps that will not mix back in. What does that suggest?
A.The milk has frozen
B.Nothing has changed
C.A new substance has formed
3.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.Which beaker is prettiest
C.Nothing, color proves nothing
4.Iron left wet turns into orange rust. Is the rust a new substance?
A.No, it is paint
B.Yes, it is different from the iron and cannot easily be turned back
C.No, it is just dirty iron
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.Sugar always makes new substances
C.Nothing is wrong
6.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
7.Salt dissolves in water and comes back when the water dries. Was a new substance made?
A.Yes, because it disappeared
B.No, the salt was there all along
C.Yes, the water made salt
LessonPrint · 5-PS1-4 · Set 1 · free to copy for classroom use
Answer key — Did Mixing Make Something New?
Set 1. Prints on its own sheet.
1.1. The vinegar and soda gave off gas and left a new solid, which cannot be undone. 2. Gas given off, or a solid left that does not undo. 3. A clear liquid formed, and the salt reappeared when dried. 4. It fizzed, gas was given off and a new solid was left.
2.A new substance has formed
3.Whether the change can be undone, to see if a new substance formed
4.Yes, it is different from the iron and cannot easily be turned back
5.The sugar has only dissolved, and it is still there
6.Bubbles of gas appear that were not there before
7.No, the salt was there all along
Questions about Did Mixing Make Something New?
What does the Did Mixing Make Something New? worksheet cover?
It practices using mixing results as evidence of whether a new substance formed — 7 questions for Grade 5, all on NGSS 5-PS1-4: Test whether mixing substances makes a new one. The instruction to students is “Read the record, then answer the questions”, and the answer key follows on the next sheet.
Which NGSS performance expectation does Did Mixing Make Something New? practice?
5-PS1-4, under Physical Science for Grade 5. The published performance expectation reads: “Conduct an investigation to determine whether the mixing of two or more substances results in new substances.” The worksheet assesses that performance expectation rather than a paraphrase of it.
What age or grade is this worksheet for?
Did Mixing Make Something New? is written for Grade 5, typically ages 10-11. It is one of the sheets on 5-PS1-4, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.
Does Did Mixing Make Something New? come with an answer key?
Yes. All 7 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Did Mixing Make Something New? can I print?
25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Did Mixing Make Something New? free to print and photocopy?
Yes. Did Mixing Make Something New?, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.