Tectonic plates and more
The crust that is under the ocean
Oceanic Crust
What is the thinnest layer of Earth?
If you decrease the temperature or take away heat, then things will be more dense and ________ (sink/ rise).
sink
Seafloor spreading occurs at:
A. mid-ocean ridges
B. mid-continent ridges
Mid-ocean ridges
What is the name of the supercontinent where all continents were connected?
Pangea
What are the two types of convergent boundaries?
Which layer has convection currents that move tectonic plates?
The mantle
True or false? Volcanic eruptions can result from convection currents.
True
True or false: Mountains make up mid-ocean ridges.
True
What is Wegener's theory called?
Continental drift
Which layer of the earth is responsible for the magnetic field?
The outer core
This is the circular motion that happens when a hot liquid or a gas rises and then cools and sinks.
Convection current
True or false: Convergent plates cause seafloor spreading.
False--divergent plates!
Continental drift theory states that the continents used to be together in a giant land mass called Pangea, but they drifted __________ (apart/together).
Apart
Continental crust
Which layer is ONLY liquid (hint: it is made of liquid iron and nickel)?
The outer core
Which of the following causes convection currents in the mantle?
A. the ocean
B. temperature
C. weight
D. mass
Temperature
Rocks get________(younger/older) as you move farther away from the mid-ocean ridge.
older
Name two pieces of evidence that Wegener used to support continental drift theory.
Seafloor spreading occurs at what type of boundary?
Divergent boundary
The inner core is under a lot of _______, so it is solid (hint: think about force).
pressure
Increasing temperature will make things _____(more/less) dense, so they will rise.
Less
This is the process where new oceanic crust forms due to volcanic activity.
Seafloor spreading
What were found on different continents, causing Wegener to think the continents used to be connected?
(hint: dinosaurs)
Fossils