Students use water and rubbing alcohol to explain how sweat cools mammals' bodies. They write their findings in a journal. After a lecture/demo, students perform a simple experiment that demonstrates this phenomenae.

Young scholars take a closer look at human skin. In this biology lesson plan, students describe the four functions of the skin as they complete a hands-on activity.

Fifth graders read about how different animals protect themselves, and how characteristics give animals an advantage in their environment. Students then discuss a variety of "outer" wear for humans, and what they might choose to wear in...