Book excerpt: People sweat to stay cool. The water comes out of our skin. As it dries, it takes the heat from our body with it. This helps us to stay cool. If the water is not drying fast enough, we can sit in front of a fan. This takes the water off our bodies faster. If that is not enough, we can add more water to our skin. We do this by running through a sprinkler or going swimming. Now that is a lot of water on your body. And all of that water is taking away some of the heat. That is how we stay cool. But many animals do not sweat. They also do not have sprinklers they can run through! They have to find other ways to stay cool. Here is how they do it. Ages 7 to 12 and up. All measurements in American and metric. Reading level: 3.4 Educational Versions include exercises designed to meet Common Core Standards. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.