Help
Options
Question
3 factors that affect the formation of magma
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
magmas are named after ____rocks
Remaining cards (38)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Stack #814034
| Question | Answer |
|---|---|
| 3 factors that affect the formation of magma | temperature, pressure, and water |
| magmas are named after ____rocks | extursive |
| basaltic magma forms when rocks in the ____melt | upper mantle |
| basaltic magma contains small amounts of silica and a low____ | viscosity |
| andesitic magma forms from oceanic crust and____ | sediments |
| _____magma fuels volcanoes with intermediate eruption | andesitic |
| rhyolitic magma forms deep beneath ____crust | continental |
| rhyolitic magma has the highest____content of 3 types of magma | silica |
| rhyolitic magma has the same composition of____. also has a high viscosity and flows___ | granite , slowly |
| ___magma produces very explosive volcanoes. | rhyolitic |
| how does the viscosity of magma change as magma cools? | the amount of silica in magma increases viscosity |
| _=quick flow, low viscosity,50%silica _=resistance to flow, high V,70%silca | basaltic & rhyolitic |
| Intrusive igneous rock body | pluton |
| largest pluton | batholith |
| Irregular shape, pluton looks like batholith but smaller | stock |
| mushroom-shaped pluton | laccolith |
| pluton that is parallel to the rock it intrudes | sill |
| pluton that cuts across preexisting rocks | dike |
| process responcible for the formation of many plutons | mountain-building |
| lava erupts through an opening in earths surface called a ___ | vent |
| a bowl-shaped depression that forms around the vent of a volcano is a __ | crater |
| rock fragments thrown into the air during a volcanic eruption is___ | tephra |
| the smallest tephra are___ | dust |
| fast moving clouds of gas ash and other tephra are___ | pyroclastic flows |
| what forms when the top/side of a volcano collapses into magma chamber? | caldera |
| when magma reaches earths surface, it is called.... | Lava |
| underwater volcanoes that have not reached the surface | seamounts |
| where do volcanoes form? | subduction boundries, |
| these, form on the overriding plate oceanic/oceanic or oceanic/continental, 80% of volcanoes are found here | subduction boundriessss |
| major belts formed at convergent boundries. 1 | pacific ring of fire ( CIRCUM PACIFIC BELT) |
| major belts formed at convergent boundries. 2 | divergent boundries ( also occurs at midocean ridges called seafloor spreading) |
| major belts formed at convergent boundries.3 | hot spots |
| form when a plume of magma in the mantle is forced upwards through the curst. | Hot spots! |
| an explosive form of magma | rhyolitic |
| magma with the lowest viscosity | basaltic |
| magma with lowest gas content | bBBasaltic |
| has broad gently sloping sides and a nearly circular base | shield cone |
| small volcano with steep sides | cinder cone |
| most dangerous to humans, & fueled by magma that contains large amounts of silica , water and gases | composit/strauto |
Created by:
winston265