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Hello. So we start a new unit of social science, the Unit 3, okay?

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And we are going to see the landscape change. What is a landscape?

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It's what can you see, okay? What you can see from your point of view, okay?

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For example, a city, the mountains, the town, that for example.

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Look at this picture. We have a mountain, we have a city, we have a slow bridge. What do you think

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is natural? Do you think the city is natural? Is it made by nature, made by the earth? No.

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Now, is the bridge natural?

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It's made like la-la-la.

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No, right?

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Someone has to build the bridge.

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Is the mountain natural?

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Yes, it is.

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It's natural.

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The mountain, the sea, the forest, the rivers, all that are natural.

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What happens with the city, the streets, the roads, all that is man-made. Man-made. So man-made is everything done by the human being, okay? By man, by people.

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So the people build cities, towns, the houses, the buildings. People also build the bridge, the roads, imagine a sky station in the mountains. All that is man-made.

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So in this unit we are going to learn about natural parts in the landscape, man-made parts in the landscape and also why do they change.