Vocabulary
Volcano
a weak spot in the crust where molten material, or magma, comes to the surface
What is an example of an element?
carbon, hydrogen, oxygen
Where is magma located?
in a pocket beneath the surface
How do dikes form?
hardened magma that forces itself across rock layers
What causes a hot spring?
when groundwater is heated by a nearby body of magma or by hot rock deep underground
Magma
a molten mixture of rock-forming substances, gases, and water from the mantle
What is Silica?
a compound that is made up of particles of the elements of oxygen and silicon
What is an active volcano?
a live volcano that is erupting or has shown signs that it may erupt in the near future
How do volcanic necks form?
forms when magma hardens in a volcano’s pipe
What causes a geyser?
a fountain of water and steam that erupts from the ground
Lava
what magma is called when it reaches the surface
True or false?
The grater the Viscosity, the faster the flow
false
During a quiet eruption does the magma have high or low in silica?
During a quiet eruption magma is low in silica.
What are the three types of volcanos?
Shield, Composite, and Cinder cone volcanos
What is geothermal energy?
water heated by magma
Ring of Fire
a major volcanic belt formed by the many volcanoes that rim the Pacific Ocean
What are physical properties?
Any characteristics of a substance that can be observed or measured without changing the composition of the substance.
What is a pyroclastic flow?
when an explosive eruption hurls a mixture of hot gases, ash, cinders, and bombs
How do dome mountains form?
forms when uplift pushes a batholith or smaller body of hardened magma toward the surface
True or false?
Geothermal energy can be used as a source of electricity.
True
Island arc
volcanoes that create a string of islands
What are chemical properties?
Any property that produces a change in the composition of matter.
What are the two types of volcanic eruptions?
Quiet eruption and an Explosive eruption
Name at least three landforms that form from magma
Volcanic necks, Dikes, Sills, Batholiths, Dome mountains
what are two types of geothermal activity?
Geysers and Hot springs