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TIME FOR A CHANGE The Earth's surface is constantly changing. Some changes happen very slowly, over long periods of time such as weathering, erosion, and uplift. Other changes happen abruptly such as landslides, volcanic eruptions, and earthquakes. All around us, we see the visible effects of the building up and breaking down of the Earth's surface. |
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BLAST FROM THE PAST Take a look outside. What do you see? Mountains? Buildings? Cars? Trees? Take another look outside. This time imagine your surroundings without any manmade objects. Take a look at the land. What do you see? Is it flat? Do you see canyons? Mountains? Valleys? Lakes? Rivers? What does the Earth's surface look like where you live? |
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DRAW IT! Pretend that there are no man made structures where you live - no roads, no buildings, no power lines, no cars. Draw a picture of the land you see out of your window as if there were nothing there made by man. What is in your picture? What does the land look like? Time to draw one more picture. This time draw a picture of what you think the land outside of your window looked like a million years ago. Does your second picture look like your first picture? Probably not. The Earth's surface is constantly changing. Some changes happen very slowly. Some changes happen very quickly. All around us, we see the effects of the building up and breaking down of the Earth. In this unit we will explore how the Earth's surface changes. |
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Revised March 1, 2002 by Kathleen Ochsenbein