- name of man who came up woth theory of CONTINENTAL DRIFT
Who is Alfred Wegener?
100
magma
What is the term for hot, melted rock inside the earth?
100
- when the theory was proposed
What is the late 1960's?
200
What is the difference between rocks made from magma and lava?
rocks made from lava are called extrusive igneous rocks and they are formed quicker than rocks made from magma which are called intrusive igneous rocks
200
- name of boundary when two plates are moving away from each other or separating
What is a divergent boundary?
200
- the most obvious piece of evidence used to support the CONTINENTAL DRIFT theory
What is the jigsaw fit of the coastlines between Africa and South America?
200
Pangaea
What is the name given to the supercontinent that included all land masses?
200
- term given to plates that include both continental crust and ocean floor
What are tectonic plates?
300
type of rock forms when heat or pressure is applied to igneous rock
What is metamorphic rock?
300
- name of boundary when two plates are sliding past each other
What is a TRANSFORM boundary?
300
- it is the year that the theory was proposed
What is 1912 or 1915?
300
an underwater mountain chain
What is the mid-oceanic ridge?
300
- the part of the earth that tectonic plates float on
What is the mantle?
400
- type of igneous rock that forms when LAVA cools
What is EXTRUSIVE igneous rock?
400
- name of boundary when one plate slides under another plate as they collide
What is a SUBDUCTION boundary?
400
- what made up the 'plates' in this theory?
What are continents or large land masses?
400
- the geologic event that usually occurs at plate boundaries and occurred in Mexico and Chile recently!
What are earthquakes?
400
- the circular movement of hot molten rock within the mantle that moves the plates
What are convection currents?
500
- term for rocks that have large crystals, coarse texture, and cooled SLOWLY
What is INTRUSIVE igneous rock?
500
- type of plate that is heavier and slides under other plates
What is an oceanic plate?
500
Four pieces of evidence used to support the Theory of CONTINENTAL DRIFT
What is:
- jisaw fit between African and South American coastline
- similar mountains on either side of Atlantic Ocean
- fossils of the same species found in Africa and South America
- ice sheets found on certain continents ?
500
- term given to magma when it reaches the water, or air if it is on land
What is LAVA?
500
- the country that is made up almost entirely of lava that has come out of a divergent plate boundary