1
we use this to show something we can't fully know or see
model
2 of the strongest forces of nature
earthquakes and volcanoes
seismogram
Moh's scale tests:
hardness
Alfred Wegener came up with the idea of Pangea, where he talked about how the continents slowly drifted apart. we call this theory:
continental drift
a scientist that studies the earth
geologist
vibrations in the ground cause
earthquakes
occurs when the products of weathering are transported from place to place
erosion
three classes of rock
sedimentary, igneous, metamorphic
underwater mountains
ridges
this layer of the earth is solid
inner core
a low number on the Richter scale means that the earthquake:
was not very strong
physical forces break apart rock
mechanical weathering
rock formed from magma below the surface
intrusive igneous rock
two plates moving apart
diverging boundary
this layer of the earth is about 2/3 of the earth's mass
mantle
a device that measures minute changes in the angle of the ground's slope
surveyors level
landforms created by running water
fluvial landforms
fossils are often found in this type of rock
sedimentary
when does a fault occur
when rocks on either side of a crack move
this layer of the earth is the one that we can see
crust
what allows geologists to get close enough to an eruption to make observations, take measurements, or collect gas and lava samples
a suit with a metal coating that reflects high temperatures
if a mineral easily splits into two parts it is known as
cleavage
two things create metamorphic rock
heat and pressure
what era are we living in
cenozoic