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03_Prerequisites

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Do you know what water, air, and rocks all have in common? They are made of matter. Matter is something that takes up space. Now, you might be wondering why they all look so different if they are made of the same thing, but the truth is that everything around you, is made of matter, just in different shapes and forms. Matter is made of tiny particles called atoms. Matter can be grouped into 3 main states, solid, liquid, or gas. To figure out which state of matter something is in we need to examine its properties. A property is the way that something is that we can measure. The physical properties we will look at to determine state of matter are shape, mass and volume. Mass is the amount of matter in an object. Volume is how much space that matter takes up. Solids are easy to recognize, rocks, apples, pencils and plants are all examples of solid objects. A solid object has a definite shape that doesn't change when you move it or put it in a container. They also have a consistent mass and volume. This is because the atoms in solid object are packed closely together so they do not move around. A solid object will change its shape only if forced, for instance if it is broken or smashed. If you look around you can find many examples of solid objects. Liquid is the next state of matter Liquids have a definite volume and mass but they do not have a definite shape. The atoms in liquid are still close together but unlike the atoms in solid they can move around. This allows the matter in liquid to flow because liquids don't have their own shape, they take their shape from their containers. The same amount of liquid may look very different in a glass than spilled on floor. You can find examples of liquids around you too water, Milk and juice are just some of the liquids you might find. The third state of matter, is gas. Gases have definite mass, but they do not have a definite shape or volume. Like liquids, gases take the shape of their containers. Unlike liquids, gases will spread out to completely fill the container they are in. If a gas is not in a container, it will keep spreading out indefinitely. This is because, the atoms in a gas are farther apart than atoms in a solid or a liquid and so they can move freely. The air you breathe is an example of a gas. You might have noticed that you can't really see air often gases are invisible. But they are still there. There are many different types of gases in Earth's atmosphere like oxygen, nitrogen, carbon dioxide, helium, and water vapor. Sometimes matter can change from one state to another. Water is very good example of this. When water is frozen into ice, it is a solid. When it melts back into water, it is a liquid. When water evaporates into water vapor, it becomes a gas. Matter in all its states, is everywhere. See if you can find solids, liquids and gases around you.

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Duration: 4 minutes and 34 seconds
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Language: English
License: Dotsub - Standard License
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Views: 8
Posted by: schoogle on Dec 24, 2015

03_Prerequisites

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