Moving Earth
How long does it takes for rocks to move through the rock cycle
millions of years
Which type of rock is made up of compacted dirt, sand and organic matter (fossils)?
Sedimentary rock
Which are heavier continental crust or oceanic crust
oceanic crust
What is weathering?
Breaking down rock into smaller pieces with wind, water ect
fossil evidence, climate evidence, jigsaw fit, rock layer evidence
What is deposition?
the dropping off of broken down rock
Which type of rock is formed from cooled magma?
Igneous rock
What is erosion?
the movement of broken down rock
What is the geological time scale?
A timeline of Earth's history based on rock layers
What is it called when sediments are pressed together?
compaction
Which principle states that rock fragments in a layer are olde than the layer containing them
Inclusions
Which principle states that older rock layers are found below younger layers?
Law of Superposition
Which principle states that a fault or intrusion is always younger than the rock it cuts through
cross-cutting relationships
Which scientist purposed the idea of continental drift?
Alfred Wegner
What is a break in rock record caused by erosion?
Unconformity
What is a divergent boundary?
plates move apart
What is the process where sediments are glued together to form sedimentary rock?
cementation
What is a transform boundary?
Plates slide past each other
Which process turns loose sediments into solid sedimentary rock through compaction and cementation?
lithification
What is a convergent boundary?
What is seafloor spreading?
A divergent plate always magma to reach the surface forming new crust in that area
What is subduction and at which kind of plate does this usually happen
when one plate slides under another plate this usually happens at convergent boundaries
What are mid- ocean ridges?
Where divergent tectonic plates are forming new crust on ocean floor
Heat and pressure can change existing rock into which type of rock?
Metamorphic rock
What causes Earth's tectonic plates to move
Convection currents beneath Earth's crust