Volcanoes_chapter_8_study_guide

advertisement
volcanoes formalong plate boundaries
lahars-mudflows made when volcanic debris mixes with water
Lava -that is very runny probably has a low silica content.
Changes in pressure and temperature in Earth’s crust and mantle
cause magma to form.
vent / fissure - magma and gases are expelled is a volcano.
volcanic soil used for3farming
shield volcano has gently sloping sides.
Subduction occurs when ____________________________________________________
2. Magma that explodes from a volcano and solidifies in the air is called _____________________
3. What can happen to global temperatures for several years after a volcanic eruption?
4. The term mafic describes magma or igneous rock that is_____________________
5. The volcanoes of Hawaii and other places far from tectonic plate boundaries are known as
6. Three types of volcanoes are _______________________________________
7. What are two uses of volcanic rocks? ___________________________________________________________
8. Rock begins to melt when _______________________
9. Columns of hot rock that rise through Earth’s mantle are called____________________
1.
Essays
1.
2.
3.
4.
How do temperature, pressure, and fluid content affect the formation of magma?
What makes a pyroclastic flow particularly dangerous?
How do volcanic rocks help plant growth?
How do mid-ocean ridges form at divergent boundaries?
5.
6.
7.
After 2,000 years of calm, Krakatau, a volcano in Indonesia, exploded violently in 1883. Ash
flew 80 km into the air and covered an area of 800,000km2 with pyroclastic debris. How do
you think this mighty eruption affected the global climate?
Living near a volcano can be very dangerous. Why do you think so many people live close to
volcanoes?
The sides of Mount Rainier, in Washington, are covered with snow and glaciers. If Mount
Rainier were to erupt explosively, what effects would you expect?
CONCEPT MAPPING
Use the following terms to complete the concept map below:
mid-ocean ridges
mafic
divergent boundaries
lahars
felsic
convergent boundaries
Download
Related flashcards
Cartography

28 Cards

Glaciology

26 Cards

Create flashcards