"Why does a magnet pick up a paper clip but not a leaf or a penny? How can the whole world be a magnet? Follow the step-by-step instructions about how to make your own magnet, and then find out for yourself what makes a magnet!"--Dustjacket.
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"The sun is a source of energy for living things. Energy that comes from sunshine is called solar energy. But how does solar energy work? And how can we use solar energy to not only stay on the cutting-edge of technology, but to help keep the environment healthy?
If a black hole is not a hole, then what is it? Find out what black holes are, what causes them, and how scientists first discovered them. Learn how astronomers find black holes, get to know our nearest black-hole neighbor, and take a journey that will literally s-t-r-e-t-c-h the...