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20 Cards in this Set

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  • Back
What does DNA stand for?
Deoxyribnucleic Acid
What is the continental drift?
the gradual movement and formation of continents
What is the innermost layer of the Earth?
Core
What layers of the Earth make up the lithosphere?
Crust and upper mantle
True or False: The core of the Earth is as hot as the sun
True
What are hypothermic vents?
A hydrothermal vent is when the planet's surface separates and extremely hot water spews out.
Why do scientists only have theories about the composition of the mantle and the core, but they know the exact composition of the core?
The mantle and core are too deep and too hot to observe directly.
What 2 bones does the knee connect?
femur (thigh bone) and tibia (shin)
There are some people who do not believe the continents were really one land mass. Give at least 2 reasons to prove Pangaea did exist.
Choose any 2:
1. The continents fit somewhat like a jigaw puzzle. For example, the west coast of Africa can fit into the gap between North and South America.

2. Plant and animal fossils found on the west coast of Africa are also found on the east coast of South America.

3. Rock layers along eastern South America match rock layers in western Africa, might mean the layers of rock (and the land) was joined at some point.
Tectonic plates boundaries move in one of three directions. Name the three directions.
Tectonic plates move in toward each other (convergent/colliding), away from each other (divergent), or rub against each other (transform/fracture boundaries)
Tectonic plates that are convergent/colliding can create what types of landforms?
mountains, trenches, volcanos or earthquakes
When tectonic plates are divergent (spreading apart) they create _____.
ridges (or valleys)
What is seafloor spreading?
The process where the plates are diverging, and the ocean floor spreads apart. The hot magma just below the crust comes up to the surface, cools and forms a new crust.
What is convection?
The idea that hotter liquid moves faster than cooler liquid.
What causes the tectonic plates to move?
There is hotter liquid in the inner mantle and core than in outer mantle. This convection causes the magma in the inner mantle to move, which causes the plate (which is just above it) to move as well.
The North American Plate and Eurasian Plate are moving about 2 cm away from each other each year. How many years will it take for North America and Europe to move 500 cm apart?
250 years
When plates diverge and magma rises to the surface, what weather event is formed?
volcano
True or False: It is likely that the continents will come together again to form a Pangaea-like continent
True
What do Global Positioning Systems do? (besides tell you how to get to the mall)
GPS's can determine the exact location of the plates and determine how fast they are moving, and in which direction (congervent/colliding, divergent, transform fault)
How does a trench form?
When plate boundaries converge (move toward each other) and one plate slides under the other.