Volcanos Effects Lava Flows These are streams of

Volcano's Effects

Lava Flows �These are streams of lava that come out of the volcano. �Move slowly: �People can get out of their way �Trees/homes/buildings all will burn if they are caught in the flow’s path.

Volcanic Ash/Tephra �Ash/tephra spews from the volcano. �This material can land on roofs, causing them to burn or collapse. �Ash/tephra is very heavy; it contains small pieces of rock. �Ash/tephra makes roads slippery, and can even bring down a modern airplane.

Mudflows �Occur when loose rocks and soil mix with water �When volcanoes erupt, ice and snow on the volcano will melt and release large amounts of water. �Water mixes with loose rocks/soil �Mudflows can burry towns miles away from the volcano.

Pyroclastic Flows �These super hot gas clouds rush downhill and knock down and burn everything in their path. �The flow will leave a thick layer of volcanic rock fragment

Landslides �The rapid movement of rock and soil downhill �A volcano’s side can collapse and start a landslide. �Caused by: �Magma moving underground �Earthquakes �Heavy rainfall

Air Quality �Volcanoes stink! �They release hydrogen sulfide �Smells like rotten eggs �They release Carbon dioxide �Deadly gas with no smell �Gases mix with water in the air, which causes acid rain. �Ash gets into the air: �Mount St. Helens released so much ash that it blocked all the sunlight for days in the state of Washington. �Some volcanoes release so much ash that the world will cool 1 -2 degrees.

Positive Effects? �Lava flows cool and harden. Over time, the rock breaks down and it forms into rich soil. �Many highly productive farmlands are near volcanoes. �Great landscape of mountains and valleys: �People want to live near volcanoes. �People want to tour volcanoes.