Matter is everywhere. It is anything that can be touched, moved, or interacted with physically. But when breaking matter down into its tiniest pieces, we find that atoms are made almost entirely of empty space. Join nuclear physicists in exploring how matter acts to make predictions about the world in this engaging physical science e-book. Fifth-grade readers will examine subatomic particles and electron shells, elements and compounds, covalent and ionic bonds, the periodic table of elements, and more through this high-interest informational text filled with vibrant photographs. Aligned to the Next Generation Science Standards, a hands-on "Think Like a Scientist" lab activity and a "Your Turn" page at the end of the e-book support STEM Education and provide young scientists with an opportunity to apply what they've learned in the text. Helpful diagrams and text features, such as a glossary and index, are also included to reinforce content-area literacy and improve close reading.