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the restless earth
geography, chapter 1
| Question | Answer |
|---|---|
| what are the layers of the earth? | The Core,Mantle, Crust. |
| whats the name of a big slab of the earths crust | plate |
| whats the name of the place where the plates meet? | plate boundry |
| what is the core made up of | mainly iron and nickel |
| what is the temperature of the core | over 4000 degrees celcius |
| what is the temperature of the mantle | up to 4000 degrees celcius |
| what state is the mantle | plastic state(like jelly) |
| what is the name of the material the mantle is made up of | magma |
| how does the magma travel in the mantle | convection currents |
| how do the convection currents move | very slowly |
| what is the crust of the earth made out of | solid rock |
| is the crust on the earth one continuos layer? | no |
| what is the crust made up of | plates |
| what sits on top of the plates | continents |
| what do the plates float on | mantle |
| what do the plates do in certain places | drag apart, separate, push together, collide, slide past |
| are the plates always moving or do they stay still | moving |
| why are the plates always moving | because they are floating on the top of the molten rock of the marble |
| what do plates cause when they collide. | folding and earthquakes |
| what is a feature associated with colliding | fold mountains |
| what is a consequence associated with plates colliding | earthquakes |
| what happens when plates collide | compression occurs at their zone of contact |
| what happens to the crust when plates collide | they buckle and arch upwards |
| what is a earthquake | shaking, rolling, sudden shock |
| where do earthquakes occur | when plates collide or slide past each other |
| what are shockwaves? | tremors which occur from the release of pressure |
| what is the focus | the place where the earthquake occurs beneath the earths surface |
| what is the epicentre | the spot on the surface directly above the focus |
| what is a ricter scale | a scale used from 1 - 10 registering the force/strength of an earthquake |
| what is a seismograph | an instrument used to measure the force of an earthquake |
| what is the san andreas fault | the boundary between the north American plate and the pacific plates |
| what are the san andreas plates causing | earthquakes |
| what happens when paltes separate? | volcanic activity |
| what are some volcanic activity features? | mid atlantic ridge, volcanic islands, volcanic mountains |
Created by:
rbowen2018
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