RISE Science Grade 8 Practice Questions - RISE Science - Grade 8 Exam

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An athletic trainer snaps an instant cold pack to mix water and solid ammonium nitrate. The cold pack quickly drops in temperature from 22°C to 4°C. How should this phenomenon be classified?

An exothermic reaction because thermal energy is destroyed. An endothermic process because thermal energy is absorbed from the surroundings. A physical change because no energy transfer took place. An exothermic reaction because cold energy is released into the skin.

Correct Answer:

An endothermic process because thermal energy is absorbed from the surroundings.

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