Transcript Webquest on Plate Tectonics

Webquest on the theories of Sea
floor spreading and Plate
Tectonics
Goals for today:
• You will be able to explain the geological
processes that shape the Earth’s Crust.
• You will analyze and explain the theory of sea
floor spreading and plate tectonics.
• You will answer a series of questions
about a) sea floor spreading b) plate
tectonics to better your understanding
of how and why the Earth’s crust
changes.
The Website: overview
• http://library.thinkquest.org/17701/high/index.htm
l# “Puzzles of the Earth”
• Left side – Menu
• Click “Plate Tectonics” on the black arrow >
• This is slide 7 answers.
• Click on “Plates on the Move” at bottom of
webpage when finished with the above answers
to find slide 8 answers.
Process:
•
•
You need 1 net book between partners.
Each partner fills in a separate worksheet. Please write
you name on the top.
• Click on the website address and answer the questions
on your sheet.
• Each partner needs to READ to each other. Please
take turns (unless there is a video).
• Finished? Pass in worksheet. Then:
Http://maccallum.wikispaces.com Go to the website.
1) Review studystacks for test tomorrow
2) Click on weblinks at the bottom of Lesson 16
3) Work on your glog/link the address to wikispace
4) Work on Earth’s crust word wall (your wikispace)
Part I: Sea Floor Spread
Read and answer the below questions:
Click here for the webpage. Partner 1 = reads
Partner 2 = reads
History:
1.
Who were the scientists who developed this theory?
2.
Describe sea floor spreading.
- What happens to oceanic and continental plates?
- The hot material that flows up from the mantle through the split is called:
_________________________________________________________
Bigger Earth?
1.
Explain why the Earth does NOT get bigger. (hint, look at picture)
2.
Predict how fast the plates move apart. Investigate the reading. Were you correct? How
fast do they move?
3.
How does the rock that makes an oceanic plate get destroyed/recycled? (picture)
_______________________________________________________________
Conclusion:
1.
Illustrate sea floor spreading. Label where ‘old’ sea floor and ‘new’ sea floor occur.
2.
Was Alfred Wegener correct when he said the continents are moving or ‘drifting’?
Watch a video on Sea Floor
Spreading! Click here.
• Billy Nye
• Scientists used new technology: SONAR
• Sonar ‘saw’ the bottom of the ocean.
What is sonar? Using echos to find objects or to find out if
a space has changed. Bats and dolphins use sonar to
navigate and find food.
Questions to answer:
• What did scientists think the ocean floor looked like
before sonar and the war?
• The neon green picture represents what under the
Atlantic ocean?
• The oldest ocean floor (in the Atlantic) occurs where?
• What is the ‘recycling’ of the ocean floor called?
Part II:
‘Plate tectonics’ (click in the menu on
webpage). Click here for webpage.
1. Explain what is meant by ‘plate tectonics’.
2. Describe what happens in the mantle that
makes the plates move. (hint- heat is used)
3. Name the tectonic plates on your map.
- Label an oceanic plate (write next to the name
of the plate)
- Which plate is Fredericton located? (make a
large star shape on it)
Part III: 3 Types of Plate
Movements
Using previous webpage:
Click “Plates on the move” link at the bottom for this
page.
1.
2.
Name 3 types of plate movements.
Choose and explain how YOU THINK 1 plate
movement is involved with creating new sea floor.
3. Predict how another plate movement could create
mountains.
(we’ll finish the 3 plate movements next week and find out
if you inferred the above answers correctly)
If you finish…
• Pass in your worksheet. Then:
Http://maccallum.wikispaces.com Go to the
website and:
1) Review studystacks for test tomorrow
2) Click on weblinks at the bottom of Lesson 16
3) Work on your glog/link the address to
wikispace
4) Work on Earth’s crust word wall (located in
your wikispace)