(Paperback)

"A tree and your pet look nothing alike, but they have one thing in common-they are both made up of cells. Cells are really small. You can see them only with a microscope. Young readers will find out about the parts of cells, how they work, and what the differences are between animal and plant cells."--

(Paperback)

"What do all the things you can see and touch in the universe have in common Atoms! Made up of electrons, protons, and neutrons, atoms are so tiny you can't see them without special microscopes. Young readers will find out about the parts of atoms, how atoms join to form molecules, and their role in the periodic table of elements"--