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
ROCK SOLID On freezing days a pail of water left outdoors turns to solid ice Certain things are true of ice that are true of all solids For example ice is colder than its liquid form water If a piece of ice is placed in a cup it keeps its own size and shape Other solids including rocks books and even individual grains of table salt keep their size and shape too On cold days even flowing water can freeze like this water coming out of a
The constant motion of atoms creates electromagnetic forces This motion creates waves of energy that pull other particles closer or push them away The atoms that form solids are held in place by an electromagnetic force This is a force that pulls atoms close to their neighbors The atoms always vibrate or shake But they stay in a set position packed close together Ice keeps its size and shape Its atoms are tightly packed together thanks to
