How might the Grand Canyon look in 1,000 years if the same pattern of erosion and weathering continue?

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Earth Science Review

• How might the Grand Canyon look in 1,000 years if
  the same pattern of erosion and weathering
  continue?
• The cliff will shrink in size
• The Canyon will fill with lava
• No change will take place
• The canyon will become deeper than it is today

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Earth science Review

• What could a farmer do to help the keep the solid
  from eroding and washing away during a rainstorm?
• Add more dirt to the area
• Add more vegetation to the area so the roots can
  hold the soil in place
• Build a barbed wire fence around the area go keep
  the soil in
• Do nothing, the land will repair itself on its own

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• The weather forecast that helped you plan
  activities
• for this week was
• probably made by a
• meteorologist.
• A meteorologist is
• a person who studies
• the weather.
• Meteorologists need many kinds of data before the
  weather can be predicted.

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• When you step outdoors, the air temperature may
  be the first weather condition you notice. In
  fact, you probably dressed a certain way to be
  comfortable at that temperature. If the
• air temperature is
• around 15C you might
• wear a sweater.

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atmosphere

• The atmosphere is the thin layer of air that
  surrounds the earth.
• The troposphere is the layer that is closest to
  the earth. This is where most weather occurs.
• The stratosphere is the layer right above the
  troposphere and is just above where most weather
  occurs.

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Air Mass

• An air mass is a large body of air that has about
  the same temperature and moisture throughout.
• An air mass forms when a large body of air stays
  in the same place for several days.

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humidity

• Humidity is the amount of water vapor in the air.
  Which means the higher the number, the more
  water vapor there is in the air. This means
  storms are near. The lower the humidity number
  means there is less chance of rain because there
  is not enough water vapor in the air to form
  clouds.

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fronts

• A cold weather front is defined as the changeover
  region where a cold air mass is replacing a
  warmer air mass. Cold weather fronts usually move
  from northwest to southeast. The air behind a
  cold front is colder and drier than the air in
  front. When a cold front passes through,
  temperatures can drop more than 15 degrees within
  an hour.

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fronts

• A warm weather front is defined as the changeover
  region where a warm air mass is replacing a cold
  air mass. Warm fronts usually move from southwest
  to northeast and the air behind a warm front is
  warmer and moister than the air ahead of it. When
  a warm front passes, the air becomes noticeably
  warmer and more humid than it was before.

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Front Animations

• Click this link to see how cold and warm fronts
  move.
• http//www.classzone.com/books/earth_science/terc/
  content/visualizations/es2002/es2002page01.cfm?cha
  pter_no20

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Weather Map

• Meteorologist place all of their data that
  they collect on to a weather map. By means of
  certain symbols, a single weather map can
  indicate atmospheric conditions above a large
  portion of the earth's surface.

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Thermometer

• Thermometers measure air temperature.
• Thermometers work because matter expands when
  heated.
• Most thermometers are closed glass tubes
  containing liquids such as alcohol. When air
  around the tube heats the liquid, the liquid
  expands and moves up the tube.
• A scale that shows the temperature is on, or
  attached to, the tube.

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Barometer

• A barometer measures air pressure.
• Air pressure presses down on the mercury forcing
  it up the glass tube.
• There is a scale attached to the glass tube.

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Anemometer

• An anemometer, like the one shown in the picture,
  measures wind speed.
• The cups catch the wind, turning a dial attached
  to the instrument. The dial shows the wind speed.

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Independent Practice

• Read Science textbook page D12 D17 and answer
  the questions.