Show:
Intro/Features/
Location
Plate Tectonics
Earthquakes
Volcanoes
Minerals
100
What are the four main parts of earth science?
oceanogoraphy, geology, astronomy, meteorology
100
before the current continents were formed, there was one "super continent" called _________.
Pangaea
100
earthquakes are measured on a scale of how many steps?
1-10
100
what is the name of the substance that controls the viscosity of magma?
silica
100
the most common type of mineral is the __________.
silicate
200
what are the four layers of the earth
crust, mantle, outer core, inner core
200
the center of seafloor spreading is the ___________.
Mid atlantic ridge
200
what is the elastic rebound theory?
the theory that rock will stretch and then slip and return to it's original form, releasing energy in the proccess
200
what are the three types of volcanoes?
Composite, cinder cone, shield
200
to be considered a mineral a rock must be what 5 things?
a solid, inorganic, naturally occuring, has a fixed chemical compound, has an orderly crystaline structure
300
how many time zones is the earth devided into?
24
300
an area where parts of plates are forced under other plates and melted into magma is known as a ___________.
subduction zone
300
what is the region around the pacific were most earthquakes happen?
ring of fire
300
what are the two types of lava/magma?
mafic, felsic
300
luster refers to a mineral's _________.
reflectiveness
400
What is the shape of the earth?
oblate sphereoid
400
the type of crust found on the ocean floor is known as ____________.
oceanic crust
400
what are the names of the two types of surface waves?
rayleigh (up and down) and love (side to side) waves
400
why are composite volcanoes explosive?
they have magma with a high viscosity in which gasses are trapped and cause pressure
400
if a rock has clevage, it means that the rock does what?
breaks along smooth flat surfaces
500
what is the difference between a theory and a law?
a law can be proven
500
the theory of seafloor spreading was thought of by a man named ___________.
Harry Hess
500
what does the modified mercali scale measure and in how many steps?
Intensity in 12 steps
500
what type of volcano is Mt. Saint Hellens?
a composite volcano
500
the hardness of a mineral is measured on a scale of 1-10 called the ________.
Mohs scale