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GEO xmas exam
this is first year jan revison for exam
| Question | Answer |
|---|---|
| what is the layers of the earth | the crust the mantle t he outer core the inner core |
| explain what convection currents are | are large currents of hot magma that move in the mantle moving the earths plates with it |
| how does the convection currents work | magma is heated up my the inner core it rises up to the mantle where its spreads and cools down this motion is repeated |
| what is plate tectonics | its the idea of the earths crust is broken into plates |
| what are the two types of plates | oceanic and contineal |
| name the three plate boundarys | constructive deestructive and conservatie |
| destruvtive plate boundarys explain what happens | convection currents drag an oceanic and continenal plate towars eachother. oceanic is heavier making it sink into the mantle continal buckles uowards making a fold mountian ad volcanoes |
| give and eg of a destruvtive nplate boundary | the andres is a fold mountian |
| draw the layers of the earth diagram | okay |
| constructive plate boudaries what happens at it | two plates separtes convection currentes drag tecttonic plates apart molten magma comes through a crack called a rift land forms volcanoes |
| eg of a construvtive plate boundaries | mid atlantic ridge runs north south alog the atlancitc ocean foor |
| what is subduction | oceanic crust is heavier that c forced downwardsinto the matnel |
| conservetive plate boundaries explain | two plates move past each othersomeitmes they get stucknbut evenutally slip foward releasing lots of energry |
| give eg of a conservative plate boudnare | san andres fault |
| how is a fold mountain formed | are formed when two plates movetoward eachother and colide making them buckle and fold upward |
| what is a anticline and synline | upwards fold and sinkcline is downards fold |
| eg of a fold moutnian | the himalays in aisia |
| what is a volcanoe | opening in the earths crust where magma ash and ases escape beenteeth the surface |
| draw a diagram of a volcanoe | add crater volcanic pipe lava layer ash layer crusr vent magma chamber mantle |
| what is mid atlantic ridge | mountian range underwater |
| how is a mid atlantic ridge formed | plates separeate magma travels up onto ocean floor water cools it rappidly |
| ecominmic impacts of volcanoe | toursim dmange property job losses |
| social impart of volcanoe | loss of life homelees snese of communtiy |
| envirmoental impacts | new land is created |
| what is a earthquake | an earthquake is a shaking or trembling at the earths crust |
| what does the plate boundaries in esthquke | they slide or collide as they try to move past friction will cause lots of energy reasling casuing the earths surface to shake |
| what is focus | the point underground where the earthquake beguns |
| what is epic centre | the point on the surface directly abouve the focus where the earthwuake is strongest |
| tremors | energy relaesed in the form of seismic waves from the focus |
| give an eg of a big earthquake that has happned | in nepal 7.9 on the rictar scale 80km away from kathmandu 90 percnt of skls were destoryed |
| what type of rocks is there | igneuos sedimentry metamorphic |
| how are igneous rovcks formed | volcantic acivitiy |
| what is intrusive | cooled inside crust |
| what is extrusive | cooled on the earths surface |
| formation of limestone | limestone is formed on the beds of shallow warm seas from the skelton of tiny sea creatures |
| two examples of of ignoues rocks are | basalt and granite |
| layers found in limestone are called | strata |
| example of a pereamble rock issss.................... | LIMMEEEEEESTONEEEEEEEEEEEEEEEEEEEEEEEEEEEE |
| memtemophic rocks formed when.........and................rocks encounters heat and............ | ignuoes and sedimentry and pressure |
| sedimentry rocks are | LIMMMMMMMMMMEEEEEEESTONEEEEEEEEEEEEEEE and standstone |
| metamorphic rocks are | marble and quartize |
| types of mass movement | landslide bog burst mudslide soil creep |
| what is carbonation | rain and cArbon dioxede= weak carbonic acid |
| where does mechanical weathering happen | happens on hills mountians eg crogh patrick co maya |
| how does mechnaical weathering work | during the day cracks in the rock fill up with rain water at night when temp drop below 0 the water freezes it expands 10percent more this putsstress on the rock during the ice melts the ccycle of freezing and throwing continues everyday eventually the ro |
| impacts of earthquake | bulidng colasping death causes landslides |
| which two tectonics plates caused the formation of the andres | nasca and south americain |
| is a valley a synicline or a anticliyne | SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSYCNILINE |
| OLDEST MT IN IRELAND | MT WICKLOW |
Created by:
abiathomas