REF
STUDY GUIDE: Big Ideas
Use to answer form questions
1.Bond Energy and Heat: Breaking chemical bonds requires energy input, while forming new bonds releases energy — the balance between the two determines whether a reaction heats up or cools down its surroundings.
2.Exothermic vs. Endothermic: Exothermic reactions release more energy than they absorb (surroundings warm up), while endothermic reactions absorb more energy than they release (surroundings cool down).
3.Engineering with Energy: Hot packs and cold packs are engineered devices that harness exothermic and endothermic reactions to transfer thermal energy for practical, real-world purposes.
WRITE AFTER HOOK FORM
Reflect before continuing
The main idea is...
This connects to what we learned because...
I can apply this by...
DRAW CONCEPT MODEL
Show your understanding visually
Draw a model that shows the main concept. Include labels and arrows
to explain relationships.
CHECK
TEST YOUR THINKING
Rate each: FALSE ← 1–2–3–4–5 → TRUE
1. Cold packs add coldness to your body, just like hot packs add heat.
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2. Temperature and heat are the same thing — they both measure how much thermal energy an object has.
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3. Energy can be created during an exothermic reaction — that is where the heat comes from.
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4. An endothermic reaction absorbs heat, so the products must end up at a higher temperature than the reactants.
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5. Breaking chemical bonds releases energy, which is why snapping a cold pack makes it cold.
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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:
THINK
SCIENTIST CIRCLE DEBRIEF
Reflect after your Scientist Circle discussion
AHA! Moment
The one I changed my thinking most about is...
Remaining Question
I still wonder...
WRITE
FOCUS QUESTION REVISIT
Final written response
Why do hot packs get hot but cold packs get cold?