Show:
1
2
3
4
5
100
3 compositional layers of Earth
Crust, Mantle, and Core
100
What is magma that has flowed onto Earth’s surface?
Lava
100
What happens during a quiet explosion?
Magma flows down the sides of a volcano like a river
100
What happens during an explosive eruption?
Hot ash, gas, and rocks shoot out of the volcano
100
Which eruption type is the most common?
Quiet
200
High pressure on the mantle causes the rock in the mantle to stay _____________.
Solid
200
What is the vent called when lava flows onto Earth’s surface?
Volcano
200
What are chunks of lava thrown into the air during an explosive eruption called?
Pyroclastic material
200
What types of eruption does felsic magma cause?
Explosive
200
What does a magma’s viscosity affect?
What happens when a volcano erupts
300
What is melted rock below Earth’s surface?
Magma
300
What is the movement of magma onto Earth’s surface called?
Volcanism
300
What is an area where one tectonic plate sinks under another?
Subduction zone
300
How do scientists classify magma?
Based on its composition
300
What is a viscous fluid like?
Thick and doesn't flow easily
400
Why does magma rise toward Earth’s surface?
Magma is less dense than solid rock
400
Where do most volcanoes (earthquakes too) form at?
Plate boundaries
400
Are most volcanoes found on land?
No
400
Why do scientists study the composition of volcanic rocks?
To understand the material in Earth's crust and mantle
400
What are the two types of volcanic eruptions?
Quiet and explosive
500
What is an opening in Earth’s surface called?
Vent
500
What is a column of solid, hot rock in the mantle?
Mantle Plume
500
What is a place where a mantle plume erupts on Earth’s surface?
Hot Spot
500
What are the two types of magma?
Mafic and felsic
500
What type of eruption does mafic magma cause?
Quiet