Multiple choice general knowledge

A student is outside on a very hot day. How does perspiration help maintain his body heat?

  1. It prevents heat from entering his body.

  2. It causes evaporation and carries away body heat.

  3. It washes off bacteria off his skin.

  4. It causes evaporation and saves body heat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sweat or perspiration cools the body through the process of evaporation. As liquid sweat turns into gas, it absorbs and carries away excess thermal energy from the skin.

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