Plate Tectonics 1-20-15 6th


What evidence did Alfred Wagner use to support his theory of continental drift?

Africa and South America fit together like a puzzle

Why do you think people didn`t belive the continental drift theory when Wagner first explained it?

He didn't prove why they had seperated

Who were the 2 scientists that brought forth supporting evidence to Wagners theory and what was their evidence?

They were Arthur Holmes and Harry Hess. Their evidence was that thermal convection in the earth’s mantle could cause continents to move

What are the three different types of plate boundaries

Divergent boundaries=plates pull away from each other.Convergent boundaries=one plate goes under one.Transform boundaries=plates slide sideway against each other.

what types of movement can occur between plates and what features can form from this movement

the forms are mountains volcanoes earthquakes

give a specific example of a location on earth where each type of plate boundary is present

Divergent boundaries: the oceanic Nazca Plate and the South American Plate.

Convergent boundaries: the Indian and Eurasian plates.

Transform boundaries: the Pacific Plate and the North American Plate

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

how old are the rocks off th east coast of nortrh americain relation to the rocks right along the mid atlantic ridge

Over 4.6 billion years and it’s because the age of the formation of the Earth and the age of the rocks are the same

why do you think this is the case

because all the continents where together and they had moved from each other

what is a convection current and how does it work

what are 7 major plate boundaries

Big image

what are two bad events that can happenas a direct resultof plate tectonics

volcanoes and earthquakes

how did plate tectonics cause these events

by rubbing against each other

what are three good things that plate tectonics provide for humans

fertile soils, ore deposits and fossil fuels.

how do plate tectonicsn cause these good things

volcanoes live things the earthquakes crumble up the ground