Here are the correct answers for each question, based on whether heat is released (exothermic) or absorbed (endothermic).
1.
b. exothermic reaction
→ When temperature increases and “heat” is written as a product, it means heat is released — that’s exothermic.
2.
b. exothermic reaction
→ Burning a candle releases heat and light — classic example of an exothermic reaction.
3.
a. endothermic reaction
→ If temperature drops, the mixture is absorbing heat from surroundings — that’s endothermic.
4.
a. endothermic reaction
→ Heat is written on the left side (as a reactant), meaning it’s needed to make the reaction happen — endothermic.
5.
a. endothermic reaction
→ Plants use sunlight (energy/heat) to make food via photosynthesis — energy is absorbed, so endothermic.
6.
b. exothermic reaction
→ Burning gasoline in a car engine releases heat and energy to move the car — exothermic.
7.
a. endothermic reaction
→ Baking bread requires heat from the oven to cause chemical changes (like rising and browning) — heat is absorbed, so endothermic.
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Final Answer:
1. b
2. b
3. a
4. a
5. a
6. b
7. a
Parent Tip: Review the logic above to help your child master the concept of exothermic and endothermic reactions worksheet answers.
