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THURSDAY, OCTOBER 28TH
Today:Isostacy….’Solids floating on a liquid’
Question of the day: How thick (in miles) is Earth’s crust?
Types of Plate Boundaries
Types of Plate Boundaries: Transform
Characteristics: Many E.Q.’s (mostly
shallow, can be mixed) Volcanoes Varying topography Different age of the
sea floor is located next to each other.
Can you find which example might be a transform boundary type?
Types of Plate Boundaries: Divergent
Characteristics: Shallow E.Q.s Few E.Q, but right on
boundary Few to no volcanoes,
along boundary if present Young rocks on both
sides of boundary Rise in sea floor elevation
along boundary
Can you find which example might be a divergent boundary type?
Types of Plate Boundaries: Convergent
Characteristics: Many E.Q.s Abundant volcanoes Deep ocean floor,
mountains on land Varying age of sea
floor
Can you find which example might be a convergent boundary type?
THURSDAY, OCTOBER 28TH
Today:Isostacy….’Solids floating on a liquid’
Question of the day: How thick (in miles) is Earth’s crust?
Isostacy
Solid floating on a Liquid Step 1 – Create a data chart
Block Mass Volume Density mm above
mm below
1
2
3
1
2
3
Isostacy
Solids floating on liquids Step 2 – Find Density!
What is the formula for Density?
Mass divided by Volume
Isostacy
Mass divided by Volume…what does that
mean?How do I find mass?
How do I find volume?
Isostacy
Mass divided by Volume…what does that
mean?How do I find the volume of this wooden block?Ans:Length x width x height
Isostacy
Floating and sinking Together we will measure how much of
the block floats in the water. - Write down the
values as we do this in front of class
Data: Record your measurements
Block Mass Volume Density mm above
mm below
1
2
3
1
2
3
Isostacy
How does this relate to the Earth?
Isostacy
How does this relate to the Earth?
Look at the Density of Earth’s Layers. How does this tie in to what we just did?
Three Main Types of Plate Boundaries
1. Divergent Plates Move Away from each other
2. Convergent Plate crash into each other
3. Transform Fault Plates grind past each other
Layers of the Earth
This is something called “Snack Tectonics”
Let’s model what happens at Plate Boundaries
Divergent Boundary
Convergent Boundary
Transform Fault Boundary
Something to think about…
Why do the Plates move?
