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Natural Science, Unit 5. Matter, Materials, and Forces.

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First, watch this video.

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Hey, what's matter?

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No, no, not what's THE matter.

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Obviously, since you're here with me, you're pretty awesome at the moment.

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You might have heard that everything is made of matter.

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And that's true.

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You, soccer balls, iPads, even your pet Fluffy.

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all made of matter. So that's interesting. But what is matter, exactly?

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The scientific answer is matter is anything that has weight and takes up space. You already know

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about weight, right? That's just how heavy something is. Like if you've ever been to a

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doctor's office, the first thing they do is have you stand on the scale so they can measure how

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much you weigh. As for taking up space, another way of thinking about it is that all matter has

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volume. It simply fills the area it's in. When you pour water into a glass, for example,

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the water's volume is the amount of space that it takes up in the glass.

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So all matter has volume and weight, but it sure doesn't all look the same. Well, that's

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because matter comes in different forms, or states. Liquids are a state of matter that

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I'm sure you're familiar with. If you've ever poured yourself a drink while trying

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to watch TV, you might have noticed that liquids take up space, because once the space inside

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your glass is full. Gah! Right on the carpet. Sorry, mom. You also know that water has weight

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if you carry a water bottle. As you drink from it, it gets lighter because you're removing

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water from it. Solids are matter too, of course, probably the most obvious kind. Rocks are

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solid, and so is ice, which is just solid water. Soccer balls are solid, iPads, your

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pet Fluffy, and every single guy in One Direction. And just like rocks, all those things have

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weight and take up space. Now you know what's weird? Sometimes matter can't be seen or

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felt, but it's there. Like the air we breathe. Air is an example of gas, the

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third main state of matter, and I probably know what you're thinking. How

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do we know air, or any gas really, is there if we can't see it? Well, we can

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prove it by doing an experiment. Science!

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Let's start by asking the question, is air matter? Because if it is, it should

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take up space and have weight, right? To see if air takes up space, lookit, I can easily

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drop an empty balloon into this little box, but a full one won't fit. That's because

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the air that fills the space inside the balloon is bigger than the space inside the box.

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Now, does air have weight? Let's try something else. Take two empty balloons and tape them

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to the ends of a meter stick. Then we'll hang the meter stick on a string so that it's

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perfectly balanced. Now let's see what happens if we blow up just one of the balloons and

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put it back on our meter stick. Check it out. The end with the full balloon sinks. It weighs more

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than the empty balloon because the air gives it extra weight. The balloon full of air will always

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weigh more than the empty one because air is matter and matter has weight and takes up space,

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whether it's a liquid, a solid, or a gas. So listen, the next time someone tells you that

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something doesn't matter, you can tell them to their face that technically everything is matter.

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And tell him Sabrina said so.

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We can find matter in three different states.

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Solid, liquid, and gas.

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Ice is solid.

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Water is liquid.

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Air, or water vapor, is gas.

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Do you think the air is matter?

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Yes, we can't see the air but it is matter.

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Air is matter and matter has weight and takes up space whether it's a liquid, a solid or a gas.

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Time to work! Write the name of three solids, two liquids and one gas.