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Science Summative Part 2
Terms in this set (25)
The thinnest layer of the Earth
A number of rigid, but moving, pieces of Earth's surface
The theory that all continents are fragments of Pangaea now drifting apart
Continental drift theory
States that youngest rocks of ocean floor are at divergin boundaries, moving outward
Sea floor spreading
Although the hottest layer of the Earth, this layer is solid metal
There are ______________ main layers of the Earth.
The thickest layer of the Earth
Plates float on top of the _______________________.
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
The Earth's crust is thinnest under the _____________________ and thickest under the _____________________.
Created the Continental Drift Theory
Evidence of matching animal fossils from two separate continents _____________________ and _____________________
Africa and South America
Evidence of tropical plants were found on this continent
Pangaea existed this many millions of years ago
250 million years
Continental Drift Theory was not accepted because it did not explain this
How the continents moved
Earthquakes and Volcanoes are usually located in relation to these
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
Name four of the major plates
South America, North America, Eurasian, Antartica, African, Indoaustralia.
This is the mechanism (what causes) the plates to move
Convection cycles in the mantle
The two types of convergent boundaries
subduction and collision
The Himalayan mountains are the result of a ___________________________ boundary.
Hot air or liquid is less ________________ than cool air or liquide
_________________ are a result from the build up of stress at a plate boundary.
The San Andreas Fault in California is an example of a ____________________ boundary.
This person used sonar to map the bottom of the ocean and discovered the mid-ocean ridge in the Atlantic Ocean.
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Borgford, Cuevas, Dumas
Focus On Physical Science
Foundations of Physical Science
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