Week 1: Evidence of Chemical Reactions - Grade 7 ScienceANSWER KEY
Name: Period: Date:
DRAWKEY TERMSGoogle each → Images tab → sketch what you see
chemical reaction
A process where substances interact to form new substances
Precipitate
A solid that forms when liquids mix
evidence
Observable signs that prove something happened
gas
Bubbles or vapor produced during a reaction
OTHER VOCAB: temperature · color change · physical change · gas production · temperature change
WRITEFOCUS QUESTIONYour initial thinking
Imagine pulling a warm loaf of bread from the oven — it's puffy and full of tiny air pockets. But you started with a flat lump of dough. Something alive in that dough produced a gas that inflated it from the inside out.
Why does yeast make bread rise?
I think...TODO: author answer text
WRITEAFTER HOOK FORMReflect before continuing
I learned that...TODO: author answer text
Station 1 — Evidence Hunt
I observed that...TODO: author answer text
This shows that...TODO: author answer text
The key concept is...TODO: author answer text
CHECKDAY 1 CHECK-INBefore you leave
Q1:Based on today's investigation of evidence of chemical reactions,
explain one key finding using evidence from your data. Connect your
answer to this week's focus question: Why does yeast make bread
rise?
TODO: author answer text
Confidence:
Week 1: Evidence of Chemical Reactions - Grade 7 Science
(Day 2)ANSWER KEY
Name: Period:
Station 2 — Reaction Explorer
The data shows...TODO: author answer text
This connects to...TODO: author answer text
The main idea is...TODO: author answer text
This connects to what we learned because...
I can apply this by...TODO: author answer text
DRAWCONCEPT MODELShow your understanding visually
Draw a model that shows the main concept. Include labels and arrows
to explain relationships.
TODO: author answer text
Labels included
Relationships shown
Key terms used
CHECKTEST YOUR THINKINGRate each: FALSE ← 1–2–3–4–5 → TRUE
1. When bread rises, it is only filling with air from outside — no new gas is created.
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2. A color change always means a chemical reaction has occurred.
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3. Yeast is a chemical, not a living organism.
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4. Dissolving sugar in water is a chemical change because the sugar disappears.
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5. If no bubbles are visible, then no gas was produced in the reaction.
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Pick any TWO statements — especially any you rated 2, 3, or 4. Justify your rating with evidence:
Statement #___ — I rated it ___ because:
Statement #___ — I rated it ___ because:
THINKSCIENTIST CIRCLE DEBRIEFReflect after your Scientist Circle discussion
AHA! Moment
The one I changed my thinking most about is...TODO: author answer text
Remaining Question
I still wonder...TODO: author answer text
WRITEFOCUS QUESTION REVISITFinal written response
Why does yeast make bread rise?
Word Bank: chemical reaction · evidence · gas · precipitate · temperature · color change · physical change · chemical reaction · evidence · gas production · precipitate · temperature change