1. Geography of a Place
Grade 3, Unit 3, Lesson 2
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5. The green line indicates the Continental Divide
The green line indicates the Continental Divide. Water to the west of the Divide drains to the Pacific Ocean. Water to the east of the Divide drains to the Mississippi River, as does water on the west of the Appalachian Mountains. The Mississippi drains the whole center of the country, emptying into the Gulf of Mexico.
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6. Earthquakes.
One way people adapt to Earthquakes is they build buildings and other structures with the effects of earthquakes in mind. See the FEMA Training site for more detailed information:
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7. Are there patterns? What causes earthquakes?
What happens to the physical landscape as a result of earthquakes?
Mountains rise or sink, tsunamis can occur, splits in the earth’s surface appear. Things in the Texas landscape that are the result of earthquakes long ago:
If desired, include discussion of the man-made structures as well, especially in relation to how humans adapt to variations in the physical environment. The specific student expectation
asks students to Describe the effects of physical processes such as volcanoes, hurricanes, and earthquakes in shaping the landscape. Information and pictures about effects on humans’ structures can be found at the FEMA training website:
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8. Volcanoes
Red triangles are volcanoes within the last 100 years. Pink volcanoes are old ( AD) purple are very old.
The USGS website shows Mt. St. Helens to demonstrate changes to the landscape caused by volcanoes.
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9. Are there patterns? What causes volcanoes?
What happens to the landscape as a result of volcanoes?
Like earthquakes, volcanoes occur most often along tectonic plates, when lava from deep within the earth finds a fissure and makes its way to the surface.
One change that can occur is that new land is created when volcanoes erupt. The Hawaiian Islands were completely created by lava from volcanoes. Since 1983, the volcano Kilauea has added nearly a square mile of land to the island of Hawaii.
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10. Hurricanes
The yellow, green and red lines are the paths of hurricanes in the Atlantic Ocean,
People adapt to hurricanes by changing their buildings to withstand hurricane winds (hurricane shutters, more sturdy building codes, buildings on stilts to survive floods, create early warning systems, develop more accurate methods of predicting hurricanes, people track hurricanes on hurricane maps)
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