David A Adler
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Kids use simple machines every day without realizing it. Teeth are wedges and so are knives, forks, and thumbtacks. Many toys such as slides, which are inclined planes, and seesaws, which are levers, are also simple machines. Two appealing kids and their comical cat introduce levers, wheels, pulleys, inclined planes, and more, and explain how they work. This lively introduction to physics will get kids excited about how simple machines simplify our...
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It can be surprising which objects float and which don't. An apple floats, but a ball of aluminum foil does not. If that same ball of foil is shaped into a boat, it floats! Why? And how is it possible that a huge ship made of steel can float? Answering these questions about density and flotation is David A. Adler's clear, concise text, paired with Anna Raff's delightful illustrations. Activities that demonstrate the properties of flotation are included....
6) Light waves
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"An introduction to the physics of light for young readers, with an overview of photons, transparency, the electromagnetic spectrum, and the mechanics of reflection"--
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Demystify geometry with this primer on shapes that will have young builders everywhere on to their next towering project. Comical cats and dogs guide kids through the essential characteristics of squares, rectangles, parallelograms, rhomboids, and other quadrilaterals. Angles and degrees are explained in accessible terms and useful visuals. Kids will get a handle on geometric vocabulary and can try out plenty of hands-on activities that will help...
16) Place value
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"The mathematical concept of place value is explained using a place value chart, descriptions of how money is notated, and humorous examples from a recipe that a group of monkeys is using to make a gigantic banana muffin"--
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"Grab your jumbo popcorn and 3-D glasses, because you're invited to the premiere of a 3-D movie! The star-studded cast of monsters will help you calculate the perimeter of the set, the area of the movie screen, and the volume of your popcorn box. Learning about dimensions has never been so entertaining."--Amazon.com.