By Katie Marsico, Reginald Butler
Readers find out how this easy desktop makes it more straightforward to maneuver issues to diverse degrees. They find out how flatter slopes use much less attempt than steeper slopes. by way of the top of the publication, readers understand the adaptation among advanced and straightforward machines and the way susceptible planes are utilized in lifestyle to make lifting and decreasing items more straightforward.
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And you’ll discover some interesting facts about the area. Did you know that earthquakes in Missouri have caused waves in the Mississippi River to travel upstream? Or that the Great Lakes hold one fifth of the freshwater of the entire world? As you read through this book, you’ll get to work on a lot of exciting experiments and projects. They will help you understand new concepts, like how a flood happens. WORDS TO KNOW plains: a flat expanse of land. the Midwest: another name for the Great Plains in the middle of the United States.
Everything on Earth is made of various combinations of atoms. half-life: the amount of time it takes for one half of a radioactive parent element to decay to its daughter element. Did You Know? Voyageurs National Park in northern Minnesota is a huge region of ancient igneous and metamorphic rocks. 5 billion years old—that’s older than the rocks at the bottom of the Grand Canyon. The area has been scoured by glaciers and is now covered by lakes. In fact, you can only get around the park by boat!
Large predators aren’t so nimble and won’t follow them. Ptarmigans look a bit like a chicken. While most birds migrate to warmer climates in the winter, ptarmigans stay all winter long. When food is scarce, they eat twigs. Ptarmigans have white feathers in the winter, and mottled brown in the summer. This helps them blend into their surroundings and hide from predators. They also grow thick feathers on their feet in the winter to help them walk on top of the snow—just like snowshoes! WORDS TO KNOW adapt: changes a plant or animal makes to survive.
Inclined Planes by Katie Marsico, Reginald Butler