Plate tectonics

by: Lauren M. 1/20/15 7th period

#1 what evidence did alfred wegner use to supports his theory of continental drift?

"Wegner noticed that the continents seemed to fit together, not at the continuously changing shoreline, but at the edge to their continental shelves. He derived this hypothesis from the observation that the continents in the southern hemisphere exhibit an identical pattern of rock and fossils known as the "Gondwana sequence". "
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#2 why do you think people didint believe the continetal drift theory when wegner first explained it

Wegner did not prove his theory, why continents were separated.

#3 Who were the two scientists that brought forth supporting evidence to Wegner's theory, and what was their evidence?

The two scientist that brought forth supporting evidence to wegners theory was Arthur Holmes and Harry Hess. Their supporting evidence was that continents were carried

#4 What are the three different types of plate boundaries, describe each type?

The three types of plate boundaries are convergent boundaries, transform boundaries, and divergent boundaries.

#5 What types of movement can occur between plates and what features can form from this movement?

convergent=mountains or volcanoes

divergent=new crust

transform=earthquake

#6 Give a specific example of a location on Earth where each type of plate boundry is present.

The Washington-Oregon coastline of the United States is an example of this type of convergent plate boundary.Examples of a divergent boundary would be a mid-ocean ridge. A famous transform fault is the San Andreas fault in California.

#7 what do plate tectonics and ocean trenches have in common?

"Plate tectonic and ocean trenches have in common the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate called subduction."

#8 #9 How old are rocks off the East Coast of North America in relation to the rocks right along the Mid-Atlantic ridge?

"Over 4.6 billion years and it is because the age of the formation of earth and the age of the rocks are the same."

#10 What is a convection current and how does it work?

a current in a fluid that results from convection.
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#11 What are the 7 major plate boundaries?

The seven major plates are the African plate, Antarctic plate, Eurasian plate, Indo-Australian plate, North American plate, Pacific plate and South American plate.

#12 What are the two bad events that can happen as a direct results of plate tectionic?

Two bad events that can happen as a direct result of plate tectonic is earthquakes and volcanoes.

#13 #15How did plate tectonics cause these events?

Plate tectonics caused these event by the movement of the tectonic plate

#14 What are three good things that plate tectonics can provide for humans?

Three good things that plate tectonics provide to humans are fertile soil, ore deposits, and fossil fuels.