Machines: Mind-boggling Experiments You Can Turn into Science Fair Projects (Spectacular Science Project)

by JaniceVanCleave (Author)

• Used

  Paperback
  1993

  $4.69

  What is a first-class lever and the advantage in using one? How does a windmill work? Are human beings machines? Children will learn the answers to these questions and more by conducting safe experiments using materials found in the home. A fun-filled and educational way to explore science including ideas for further experimentation and hints on turning experiments into science fair projects. Illustrated.