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 |