CONTENTS Matter Matters IO I2 14 16 Rock Solid Liquids Let It Pour Gases Scattered Matter Matter Can Change Let's Get Physical Matter Can Change Let's Get Chemical The Attractive Atom Elementary Elements Elements On the Table Molecules When Atoms Bond Forces on the Move or Not Getting Heavy with Gravity Glossary For More Information Index 18 20 22 24 28 30 3I 32
MATTER MATTERS Some objects are more dense than others Their particles are more closely crowded Anything that takes up space is together called matter Air water rocks and A people are examples of matter All a matter is made up of tiny particles or bits called atoms One way of describing different types of matter is by their mass The mass of an object is the amount of material that makes up the object A bowling ball for example is heavy It has more mass than A beach ball is much easier to carry than a bowling ball because the beach ball contains much less matter 4
a beach ball which is filled with gas Even though they are nearly the same size the bowling ball is harder to carry because it has more mass than the beach ball Matter exists in several different forms called states The three most familiar states are solid liquid and gas Ice solid gas water vapor liquid water LG The three most familiar states of matter are solid liquid and gas Water exists in all three states Water vapor is invisible but is shown here for
