Aging Rocks
Where can the youngest rock often be found according to the law of superposition?
Near the top
magma
What is a divergent plate boundary?
Two plates spread apart
What star is earth's axis always pointing towards?
polaris north star
Why does night and day change daily?
earth's rotation
Which rock layer is the OLDEST?
I
How might a sedimentary rock be different from a metamorphic rock?
Metamorphic rocks are more tightly packed together (stuff won't break off onto your hand)
What boundary type are large mountains usually found?
Convergent
How many degrees is earth tilted on its axis?
23.5
How does the density and thickness of continental crust compare to oceanic?
Cont = thicker and less dense
What does the law of orignial horizontality tell us about rock laters?
That rocks layers originally deposit horizontally (flat)
How can you turn any type of rock into an igneous one?
Melt it completely and cool it.
What is a transform boundary and what often happens at these spots?
Where plates move along each other opposiute ways, earthquakes
How does sunlight change from June to february?
it decreases
What is one mineral found in the rock Schist?
Pyroxene, garnet, amphibole, feldspar, quartz, mica
List the rock layers A, B, and D from youngest to oldest
D, A, B
Erode it (break it down) and then apply light pressure or lightly cement it together.
What type of boundary type is a ridge and what happens here?
Divergent, new rock formed
What star has 1,000x the luminosity of our sun?
polaris
How does the amount of sunlight change in the N hemisphere from December 21st to June 21st
It increases daily
List rock layers L, C, A, and G in order from oldest to youngest rock.
A, C, G, L
Can can a rock become igneous, and then turn into a metamorphic rock?
Describe what happens at a subduction zone when an oceanic and continental polate collide?
The oceanic ubducts under (more desne) the continental rises
What type of star would have 10x the luminosity of our sun?
Main sequence stars
What minerals are found in the sedimentary rock dolostone?
dolomite