Taking a Ride on a Lithospheric Plate

1
Taking a Ride on a Lithospheric Plate

• Chapter 2 Activity 1

2
Warm-Up

• Getting Started
• Read page 62
• Answer the questions

3
How can you find your location on the surface of
the earth?

• Latitude and longitude
• Map
• Using the stars
• GPS
• A landmark or marker

• If a landmark has moved
• Make a map and use landmarks
• GPS

4
Goals

• Determine the direction and rate of movement of
  positions within the plate on which your
  community is located, using data from the Global
  Positioning System and a computer model.
• Predict the position of your community in the
  near future, and retrodict its position in the
  recent past, by extapolating from data already
  collected.

5
Goals continued

• Recognize that the rate and direction of plate
  motion is not necessarily constant
• Describe several lines of evidence for plate
  motion.

6
Understanding and Applying What You Have Learned

• Answer questions 1-6 on page 74 and 75.

7
Measurement of Movements at GPS Stations in North
America
8
The Location and Elevation of GPS Station WES2
over Time
9
Graphs on page 66

• What does each of the axes represent?
• What are the vertical bars on the graph?
• What does the long line on each graph represent?
• Why do the graphs not start at zero?

10
Checking your understanding

• What is the difference between the lithosphere
  and the asthenosphere?
• What does the abbreviation GPS stand for?
• From where does a GPS receiver get its signal?
• Why are GPS data not enough to confirm that the
  Earths surface has been moving fore many years?

11
Preparing for the Chapter Challenge

• In your comp book, write a paragraph to convince
  the middle school students that your community is
  moving as part of the movement of a much larger
  segment of the Earths lithosphere. Describe the
  evidence used to make this determination.

12
Warm-Up

• Describe in your own words how a GPS receiver
  works.
• How does it use satellites?
• How many satellites does it need?
• What is the purpose of GPS?

13
Warm-Up

• Draw a simplified cross section through the outer
  part of the Earth. Label the following mantle
  asthenosphere, mantle lithosphere, continental
  crust, and oceanic crust.
• How did the formation of magnetic striping along
  the ocean floor help to validate the theory of
  plate tectonics?
• What is the name for the satellite-based system
  used to accuraetly locate points on the Earth's
  surface?
• Why is the mid-ocean ridge not straight?