ept Flashcards
transform fault
plates slide past one another along this transform
subduction fault
seafloor slides beneath the continental plate
spreading fault
a third major type of fault happens along ocean bottoms
difference between magma and lava
Magma is composed of molten rock and is stored in earth’s crust. Lava is magma that reaches the surface of our planet through a volcano vent
ben franklin
ben franklin believed earthquakes came from a spark in the ground
aristotle
believed that winds in the atmosphere were drawn underground, mixing with fire inside the earth causing explosions
plume model
magma wells up from deep mantle- generates a convection current that moves the continental plates
plate model
continental plates generate the motion of the mantle by absorbing and reflecting heat, causing a variation in temperature
how are volcanoes constructive
hot springs are created, landscapes are created, ash puts nutrients back in the soil, and bosalt is a cleaning agent
how are volcanoes destructive
ash contimanates the air causing suffocation,ash covers sun, lowers temp, and causes electrical storms
volcanologist
scientist who studies volcanoes
geologist
scientist who study the history and structure of the earth
shield
flat on top and broadly sloping and lava erupts gently
composite
tall and pointed, erupts lava and ash
cinder cone
generally smaller and oozes lava at the base of thevolcano
