Show:
Layers
Rock Types
Fossils
Plate Tectonics
Landforms
100
made of iron, center of the earth
What is the inner core?
100
these rocks form from quickly cooled lava
What are extrusive igneous rocks?
100
I'm older than him, but younger than her is an example of this
What is relative age?
100
this slides around on the asthenosphere and makes up the plates.
What is the crust and the upper part of the mantle (lithosphere)?
100
When one plate slides beneath another
What is subduction?
200
outermost layer, least dense
What is the crust?
200
what metamorphic rocks are made of and how
What are existing rocks that have been under heat and pressure?
200
a rock or fossil's exact age is this
What is its absolute age?
200
this is believed to be the reason plates move
What is convection in the mantle?
200
when magma seeps to the surface under water from diverging plates to form new crust
What is sea floor spreading?
300
convection occurs here
What is the mantle?
300
sediments that have been cemented and compacted together
What are sedimentary rocks?
300
paleontologists use these to help determine the age of other fossils
What are index fossils?
300
the theory that the continents moved apart over time due to the shifting of the plates
What is continental drift?
300
subducted plates form these
What are volcanoes and trenches?
400
made of magma
What is the outer core?
400
a diagram that shows how rocks are constantly changing
What is the rock cycle?
400
when elements break down, becoming a different element
What is radioactive decay?
400
plates that move apart are called this and form these landforms
What is divergent and causes mid-ocean ridges and rift valleys?
400
earthquakes form along this type of boundary
What is a transform boundary?
500
ways geologists learn about earth's interior
What is rock samples from drilling and earthquake wave movements?
500
melted rock
What is magma or lava?
500
the way that scientists date fossils using half-life
What is radiometric dating?
500
This describes two plates colliding and these are the landforms that form.
What are converging plates that form mountains, trenches, and volcanoes?
500
this makes Earth look like its a giant baseball
What is the mid-ocean ridge?