Motion is a change in an objects position. This fascinating title explains in a clear， simple way how objects are moved by a change in energy. Simple activities show young readers how energy is changed by applying a force， either by coming in contact with an object or by a force that does not touch it physically， like gravity.Motion is a change in an objects position. This fascinating title explains in a clear， simple way how objects are moved by a change in energy. Simple activities show young readers how energy is changed by applying a force， either by coming in contact with an object or by a force that does not touch it physically， like gravity.
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