Changes in Matter
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The purpose of this site is to help you learn a little bit about matter.

Matter is everywhere. Matter is anything that has mass and takes up space. Matter can be as big as an elephant or as tiny as a grain of sand. No one can tell what forms of matter make up planet earth.  

 The solid is one of the three states of matter. A solid is anything that has mass and takes up space. A solid keeps its shape. That means it does not change like other states of matter. A plastic bag is a solid. When it is filled with water it will take a different shape. Solids are made out of the crusty surface of the earth. Gravity will also hold the solid in place. Solids have got to have a certain amount of space. The reason that solids are so hard is because the molecules are bunched together.

Water is not always a liquid. When it is frozen, it becomes ice a solid. When water is heated it becomes steam, and steam is a gas. An iceberg is a huge block of frozen water. When the temperature gets warmer, the iceberg melts and mixes into the sea. A balloon is filled with a certain gas called helium. Air is a kind of gas and it is all around us.

Air is a kind of gas, but you can’t see it. Air is everywhere. Things that are burning give off a gas called smoke.

The most important liquid is water. We have to drink water to stay alive and healthy. Plants have to get water to grow. If you heat up water you get steam.

Some things are solid. All solids have a definite shape and volume. Here are some examples: a gumball is round, yarn is long, and pyramids are triangular. All solids have its own shape. 

The difference between solids, liquids, and gases is density.  Density is defined “thickness.”  A liquid is not as dense as a solid, but more dense than gas.  The density of a solid is about “20 times denser than a liquid and 800 times thicker than a gas.”  Liquids have more kinetic energy than solids, which means the molecules move around much more.   Since liquids are less dense than solids, they can be poured into a glass. 

Types of liquids:  Soda, milk, water, blood, vinegar

 

 

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