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Hello class! It's your teacher Shaila. Today we will continue with our topic,

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matter and materials, and we will learn all about how materials change.

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Let's start with this box up here that has a lot of information for us about how materials change.

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There are three states of matter, solid, liquid, or gas.

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We can change materials by heating, cooling, or bending them.

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When we freeze water, it becomes a solid.

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When we heat water, it evaporates and becomes a gas.

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For exercise one, I will explain a bit more about what bending, heating, and cooling are so that we

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can match each word to the correct picture. First, we have bending. Bending is to use force to cause

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something to become curved or bent. You can bend any material that is flexible.

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Next we have heating. Heating is energy that causes things to become warmer and

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hotter. Materials can be heated by fire, electricity, or sunlight. And finally

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cooling. Cooling is when a material loses heat and its temperature goes down so it

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becomes cold or colder than it was before. Let's look at these three

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pictures. First we have bending. Do you think that this picture of a pot being

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warmed up on a stove is bending or this picture of the plasticine being put into

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a different shape? Yes, correct. This picture right here with the hands are

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bending the material. Next we have heating. Do you think that the pot or the

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refrigerator shows heating excellent yes the pot is heating up on the stove and

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finally we have cooling which will be the refrigerator we put food into the

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refrigerator or the freezer to keep it cool so that you can still eat it for a

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long time. Next I want you to write heating, cooling, or bending. In this first picture

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we see water and a pot with steam coming from the top.

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Steam is water that is very hot and it becomes gas form. So in this first image you will write

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underneath heating. Next we have a picture of water becoming ice. It is turning into ice which

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is a solid form of water. Now tell me do you think that this picture is an example of cooling

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of water or bending of water? Please write what you think underneath cooling or bending.

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Finally, we have a piece of paper.

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In this paper, you can see that it has been folded into smaller squares.

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So they have changed the shape of the original paper.

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This folding is an example of bending the paper.

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So you can write bending beneath the picture of paper.