Parts of a Volcano
Lava is
What is magma that flows out onto Earth's surface?
Three kinds of landforms are created by the eruptions of volcanoes? Name all.
What cinder cone, Shield, and Composite?
Magma is
What is molten rock beneath the earth's surface.
Volcanoes occur where
What is occur along the boundaries between shifting tectonic plates?
Active volcanoes are
What are volcanoes that erupt constantly?
Magma chambers are.
What are reservoirs from which volcanic materials erupt?
Cinder cone volcanos are
What are made up of small rock particles, or cinders. It is characterized by a small cone with steep sides?
Property of magma that describes the material's resistance to flow based on temperature and silica.
What is viscosity?
The rock in the mantle melt because
What is tectonic plate moves under another each other (subduction zone), the rock in the mantle melts and becomes magma?
Rapidly moving clouds of tephra mixed with hot, suffocating gases
What is pyroclastic flows?
Vent of volcanos and its located
What is openings through which volcanic materials erupt located near the peak of the mountain?
Shield volcano are
What is made up of layers of lava rocks. it's not as steep as cinder cone volcano and is created slowly that's why it has gentle and broad sides?
Hot spot are
What is a region of volcanic activity in the middle of a tectonic plate?
When magma rises
What is magma, the melted mantle, rises because it is filled with gas and is less dense than the solid rock around it?
Underwater lava eruptions
What is pillow lava?
Craters are
What are bowl-shaped depressions that forcefully explode can cause may blow out the tops of mountains to form craters?
Composite volcano are
What is made up of layers of lava flows alternating with layers of ash, cinders, and rocks. it is a combination of cinder cone and shield volcanoes?
Larger depressions formed under volcanos when the magma chamber empties after eruption
What is a caldera?
Magma intrudes parallel to layers of rock
What is a sill?
Two properties of felsic eruptions
What is feldspar and silica?
Define Subduction Zone. Where is it located?
What are subduction occurs when two plates collide. the denser; heavier, plate slides under the other plate and becomes part of the mantle?
Volcanic landform with the most destructive. Name a volcanic landform that was developed this way.
What is composite volcano? Mt. St. Helens is a composite volcano.
Solidified pieces of lava and crust pieces thrown during an eruption.
What is tephra?
Hot spots form new land how. Name a landform created by hot spots.
What is hot spots erupt and release magma that hardens into landforms? Hawaiian islands are created by hot spots.
Climatic change to the Earth
What is ash and gas blocking the sun and dropping the temperature?