What do we call a hole in the side of a volcano where lava can escape?
Vent
200
Which type of rock is granite?
Igneous
200
Which plates move towards one another (head on)
Convergent plates
200
What is a geyser?
A hot spring that occasionally releases hot water and steam.
300
What is the core made out of? (2 answers)
Iron and nickel
300
What is a volcano called when it HAS erupted within the last 10,000 years?
An active volcano
300
When rocks melt, what do they turn into?
magma
300
What can form during convergent subduction?
Volcanoes
300
What are the two types of earth's crust?
Oceanic crust, Continental crust
400
How thick is the crust?
25 milesw
400
What do we call magma once it is above the earth's surface?
Lava
400
How do sedimentary rocks form?
Rocks go through the process of erosion and weathering and break down into small parts. When the small SEDIMENTS break down, they begin to layer and compress into sedimentary rocks.
400
How did Alfred Wegner decide that a supercontinent used to exist?
What did we call this supercontinent?
He realized that the continents fit together like a puzzle/ he saw that animals that lived on both continents (so they had to be touching)
Pangea
400
What is the opening in a volcano called?
The crater
500
What is the temperature of the Earth's core?
About 10,000 degrees
500
What happens to the temperature of the atmosphere when a volcano erupts?
The temperature gets cooler (cloud blocks the sun)
500
Describe the Rock Cycle
Igneous, Metamorphic, Sedimentary --> Melt turn to magma
I, M, S --> Weathering and erosion --> turn to sediment
Sediment --> Layers and compresses --> Sedimentary
I, M, S--> get smooshed and cooked --> metamorphic
500
How do the plates move?
Convection currents under the crust's surface (located in the mantle) cause the plates to move.
500
What do we call the giant circle of volcanoes located in the Pacific Ocean?