Unif/Cata
In a set of rock layers, which is usually the oldest?
Ones on the bottom
What are the two types of plate boundaries?
BONUS 100 pts: what is the third type of plate boundary
Divergent and Convergent
BONUS: Transform
in reference to tectonic movement, the reason why continents seem to be "drifting away"
Divergent
The thickest layer of Earth is called what?
Mantle
True or False: Oceanic plates are sand
False - all plates are solid rock
This concept suggested that landforms were caused by large abrupt changes
Catastrophism
In this type of boundary, one plate is forced under the other.
Convergent
sits on top of the mantle
Plate
What type of matter is the mantle made of?
Plasma
On what layers of Earth are plates located?
Crust
Fancy name for rock layers
Strata
What type of landform forms near a convergent plate boundary?
Trench
a phenomenon that occurs after tectonic movement
earthquake
What is the range of miles, that the crust is thick? From ________ to _______
75 miles to 2 miles thick
What is the name of the supercontinent that broke apart millions of years ago
Pangea
Rock layers on Earth lay down straight due to gravity
The two types of plates we have are called
Oceanic and Continental
The view of something, looking at the insides.
Cross section
Approx. how hot is the inner core?
Approx. 12,000 °F or 6,000 °C
What type of boundary is between South America and Africa
Divergent plate boundary
a way of dating something without knowing its actual age
relative dating
At a mid-ocean ridge, this occurs - adding more rock as the plates pull apart
Sea-floor spreading
A diverging plate boundary is always located on one.
Mid-Ocean Ridge
What happens in the mantle, that allows for the recycling of rock?
Convection Currents
Diverging plate boundaries cause ___________ landforms
Volcanoes/ mid-ocean ridges