Reactions That Release or Absorb Heat
Distinguish between exothermic reactions (release energy, temperature rises) and endothermic reactions (absorb energy, temperature falls), with everyday and industrial examples
Lesson
Set out your lesson
“Reactions That Release or Absorb Heat means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.”
Bring to the table
- A battery, bulb, and wires OR a warm/cool cup comparison setup
- Paper for a simple energy-path note
Extra for the adult
Worked example. Battery → wires → bulb: chemical energy becomes light (and some heat).
Optional challenge. For Reactions That Release or Absorb Heat, add one harder example after success.
What to notice. Keep one parent note: examples tried; results; support used. This session samples Reactions That Release or Absorb Heat, not mastery.
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Teaching approaches
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1 approach
Reactions That Release or Absorb Heat means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.
Materials: A battery, bulb, and wires OR a warm/cool cup comparison setup; Paper for a simple energy-path note. 1. Say the goal of Reactions That Release or Absorb Heat in plain words once. 2. Adult shows one energy transfer (circuit lights, or heat moving to a cooler hand nearby) and names the path. 3. Child traces or describes three energy paths and says what changed. 4. Fresh check: one fresh energy-path description. Record and stop. Done: three energy-path notes with a before/after change. Proof: parent note of examples and results. Stop: End after the fresh check; keep optional challenge for another day.
Family records and proof options
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Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Practice this concept
Start practiceReactions That Release or Absorb Heat practice
Practice key ideas from Reactions That Release or Absorb Heat.
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Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
PhET Interactive Simulations · Practice link — not the full lesson
Balancing Chemical Equations
Before you open · source notes
Balancing Chemical Equations supports hands-on exploration for Reactions That Release or Absorb Heat. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “Balancing Chemical Equations.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Defines exothermic and endothermic in terms of energy transfer to and from the surroundings
- Gives two examples of each type from everyday life (e.g. combustion, hand warmers; photosynthesis, cold packs)
- Explains energy changes during changes of state (melting is endothermic, freezing is exothermic)
- Interprets a temperature change in an experiment to classify the reaction type
“If your child shook a sports cold pack to activate it and it got cold, or lit a match and it got hot, could they explain what type of reaction is happening in each case and why one gets hot while the other gets cold?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Matter & Materials
- Age range
- Ages 12–13
Standards