Layers of the Earth
Plate Boundaries
Tectonic Plates
Rock Cycle
Challenge
100
What is the name of the layer of the Earth that we live on?
The crust
100
Name the three types of plate boundaries we have studied
Divergent, Convergent, Transform
100
Refer to Plate Map. What is plate 1?
North American Plate
100
The type of rock formed from the solidification or cooling of magma.
Igneous Rock
100
What is the name of the supercontinent that is believed to have existed 250 million years ago?
Pangaea
200
Name the four layers of the Earth in order.
Crust, mantle, outer core, inner core
200
What geologic landforms do we expect to find at subduction zones?
Trenches and volcanoes
200
Refer to map. What is plate 3?
Pacific Plate
200
What type of rock is formed from the compaction and cementation of rock particles?
Sedimentary
200
What causes a tsunami?
An underwater earthquake
300
What is the hottest and densest layer of the Earth?
The inner core
300
At what type of boundary do only earthquakes (not volcanoes) occur?
A transform boundary
300
Refer to map. What is plate 4?
Antarctic Plate
300
What type of rock is formed from intense heat and pressure within the Earth?
Metamorphic rock
300
What causes an Island Arc?
Underwater volcanoes release magma eventually forming new islands.
400
What is the name for the layer of tectonic plates that surrounds the Earth?
The lithosphere
400
At what type of boundary does new seafloor form?
At a divergent boundary
400
Refer to map. What are plates 5 and 6?
5 South America 6 Africa
400
Explain how a metamorphic rock can be changed into a sedimentary rock.
The metamorphic rock is weathered into sediment. Then that sediment is compacted and cemented into sedimentary rock.
400
What two things in the asthenosphere causes the plates to move?
Convection currents and plasticity.
500
What is the name of the semi-solid layer underneath the lithosphere? What property does it have?
The asthenosphere, plasticity
500
Identify and explain what happens at the two types of convergent boundaries
2 oceanic plates create island arcs and trenches 2 continental create mountain ranges 1 of each creates Volcanic arc and trenches
500
Refer to map. What are plates 2 and 7?
2 Indo-Australian 7 Eurasian
500
Explain how Sedimentary rock becomes Igneous rock.
Sedimentary rock must be melted into magma. When that magma cools, it forms igneous rock.
500
New seafloor is created everyday. Why isn't the Earth getting larger?
Because subduction zones occur! Places where one plate is recycled back into mantle.
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