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The Surface of Earth Changes

The Surface of Earth Changes. MST Lesson Plan Grade 4 Unit Plan Diana Walcott-Ward Shantell King Susan Charles Spring 2013. Erosion. The process by which water, ice, wind or gravity moves fragments of rock and soil. There are many types of erosion. Water erosion Wind erosion

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The Surface of Earth Changes

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  1. The Surface of Earth Changes MST Lesson Plan Grade 4 Unit Plan Diana Walcott-Ward Shantell King Susan Charles Spring 2013

  2. Erosion • The process by which water, ice, wind or gravity moves fragments of rock and soil.

  3. There are many types of erosion • Water erosion • Wind erosion • Ice erosion Each one can do significant damage to the land.

  4. Match the cause to the effect • Ice erosion • Wind erosion • Water erosion • Creation of U-Shaped Valleys • Rivers, streams, and run off • Loss of soil on the ground

  5. Can you guess which pictures were caused by wind, water, or ice erosion?

  6. Weathering • The breakdown do the materials of Earth’s crust into smaller pieces. • There are two types of weathering: Physical weathering and chemical weathering

  7. Physical weathering • Process by which rocks are broken down into smaller pieces by external conditions. • Types of Physical weathering • Frost heaving and Frost wedging • Plant roots • Friction and impact • Burrowing of animals • Temperature changes

  8. Chemical Weathering • The process that breaks down rock through chemical changes. • The agents of chemical weathering • Water • Oxygen • Carbon dioxide • Living organisms • Acid rain

  9. Can you spot 2 physical and chemical agents?

  10. Natural Disasters • Natural disasters such as flood, fire, earthquake, tornado and windstorm affect thousands of people every year. We will discuss the following: • Hurricanes • Earthquakes • Tornadoes • Volcanoes

  11. Earthquakes • An earthquake is the sudden, rapid shaking of the earth, caused by the breaking and shifting of never-ending rock underground as it releases strain that has accumulated over a long time. • Unlike other natural disasters earthquakes occur with virtually no warning. There is no advance warning or immediate preparation with earthquakes.

  12. Hurricanes • A type of tropical cyclone or severe tropical storm that forms in the southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico, and in the eastern Pacific Ocean. • Unlike earthquakes, hurricanes are predicted days to weeks in advance, giving communities time to prepare.

  13. Tornadoes • Tornadoes are nature’s most violent storms. A tornado appears as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 miles per hour. • Like earthquakes, tornadoes can bring mass destruction in a matter of minutes, and individuals typically have little time to prepare.

  14. Volcanoes • A volcano is a mountain that opens downward to a reservoir of molten rock below the surface of the earth. • When the opening of top of the volcano belch out smoke, gases, ashes, and lava comes out volcanoes erupt.

  15. Natural Disasters • Write two sentences about the natural disasters below.

  16. Video about Earth’s Changes • http://www.youtube.com/watch?v=H2h6uXlL8gI

  17. A natural disaster in my area • What might you see, hear, or smell after a hurricane came through this area?

  18. Natural Disaster Safety • Which items belong in your natural disaster kit?

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