geologic timeline
Earthquakes
Volcanoes
Rocks
Minerals
100
what happened during the pre cambrian period
the big bang
100
what is an earth quake
vibrations produced by breaking of rocks within Earth's crust
100
what comes out of volcanoes
lava
100
how is igneous rock formed
When magma cools and solidifies
100
how do minerals form
from the cooling of hot melted rock
200
what is the 2nd time period called
cambrian
200
what is the epicenter
the point on Earth's surface above the earthquakes focus
200
what are volcanoes
mountains that form when layers of lava and volcanic ash erupt and build up
200
how is sedimentary rock formed
Sediment deposited over time, often as layers at the bottom of lakes and oceans
200
name 1 of the 3 crystal systems
cube, tetragonal, and hexagonal
300
when did bark begin to grow on trees
the Mississippian era
300
what are the 3 different types of faults
normal,reverse, and strike-slip
300
what is the opening in the earth's that allows magma to flow out
vent
300
how is metamorphic rock formed
extreme pressure and heat
300
what are diamonds made of
carbon
400
what is the first period of time called
pre cambrian
400
where do 80% of all earthquakes happen
The pacific plate
400
what are the different types of volcanoes
shield, cinder cone, and composite
400
what are the 3 different types of rock
igneous, sedimentary, and metamorphic
400
what are 2 of the 5 characters of minerals
formed by a natural processes, inorganic, solid, definite chemical composition, atoms are arranged in a crystal pattern
500
when was was the most recent ice age
quaternary
500
what makes earthquakes happen
when the tension between two fault lines is too much and they slide
500
where do volcanoes occur
where plates separate
500
what are rocks
naturally occurring solids made up of minerals
500
what is the definition of a mineral
naturally occurring, inorganic solids with definite structures and composites
M
e
n
u