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Earth Structure
Plate Tectonics
Earthquakes and Tsunamis
Volcanoes
Soil
100
Makes up about .5% of the earths mass, is divided into two types: Oceanic and continental
What is The Crust
100
Two plates moving towards each other
What is a Convergent Boundary
100
Method of measuring the strength/magnitude of an earthquake.
What is the Richter scale?
100
This gas is released by volcanoes in large quantities and impacts climate and is a contributor to acid rain.
What is sulfur dioxide?
100
Organic matter, such as decomposing leaves
What is Humus/ O Horizon
200
Mostly made of iron. The inner part of this layer is under so much pressure that it remains solid.
What is The Core
200
Two plates rubbing against each other moving in opposite directions
What is a Transform Boundry
200
Area where the stored energy of an earthquake is released.
What is the focus?
200
The narrow pipe through the volcano where magma shoots up through.
What is the conduit?
200
A mass of rock which forms the parent material for soil. Under the C horizon.
What is Bedrock
300
Where the majority of the Earths mass is
What is The Mantle
300
Where two tectonic plates meet, and one slides under the other.
What is a Subduction Zone
300
Waves that travel through the earth and occur after bedrock expands or contracts.
What is a P wave?
300
5% of volcanoes occur at these points.
What is a hot spot?
300
The correct order of the soil layers top to bottom
What is O A E B C
400
A discontinuity between the crust and mantle
What is The Moho
400
Upper layer of the crust divided into tectonic plates
What is the Lithosphere
400
Majority of all tsunamis happen in this type of zone.
What is a subduction zone?
400
Mountain that exploded in 1980 in Washington State killing 57 people.
What is Mount Saint Helens?
400
Deposit from which the soil develops
What is Parent Material
500
Upper third of the Mantle
What is The asthenosphere
500
A theory describing the movement of tectonic plates, first proposed by Alfred Wegner in 1912.
What is Continental Drift Theory
500
Tsunamis are a consequence of this type of disaster.
What is an earthquake?
500
Pressure in a magma chamber forces molten magma up through the volcano.
What is an eruption?
500
The soil is composed primarily of
What is Minerals