Meet Magnetism they're the invisible force that causes magnets to work! Magnetism will introduce readers to how magnets function and their relationship with electricity. They'll learn about natural magnetic materials, fields, poles, electromagnetism, and compasses. Along the way they'll meet scientist James Clerk Maxwell. A handy timeline extends the learning by drawing on the history of scientific discovery. For more information about the science that powers our lives, check out other titles in the Building Blocks of Physical Science series!