Literally Everything That Youll Need To Know Flashcards
What is the thinnest layer of earth
The crust
What is the thickest layer of earth
The mantle
What was wegners theory
At one point in time, the continents were all joined together forming one single procontinent but then the land apread apart.
Why is the jigsaw fit evidence for wegners theory
He observed that the coasts of the continents fit together like a jigsaw
Why is geological patterns evidence for wegners theory
Wegner noticed rocks of the same type are found all over the world, for example the USA, morthen parts of the UK, scandinavia. Identical mountain structures have also been found on the other side of the ocean
Why is the studying of fossils evidence for wegners theory
Fossils of animals datinf back to millions of years ago like the Mesosauras have been distributed among the coasts of the continents that fot the jigsaw fit.
What landforms can spawn on divergent/constructive plate boundaries(give an example of that plate boundary too)
Divergent-Iceland- Shield volcanoes, earthquakes
What landforms can spawn on convergent/destructive plate boundaries(give an example of that plate boundary too)
Convergent-Andes- Composite volcanoes, earthquakes
What landforms can spawn on Conservative/transform plate boundaries(give an example of that plate boundary too)
Conservative-San andreas fault- just earthquakes
What landforms can spawn on convergent collision plate boundaries(give an example of that plate boundary too)
Fold mountains
Why do earthquakes happen
As the plates move past each other or towards each other pressure builds up from the friction. When the pressure is enough, the plates give way, releasing seismic waves,. Thw plates will surge past each other and the ground shakes- an earthquake
On what plate does volcanos form(BRO ITS ONLY ONE PLATE AND ITS THE ONE YOU REVISED)
Convergent / destructive plate
Explain how convection current plays a role in moving our tectonic plates
-Convection currents play a role in dragging our plates across the surface of the earth
-Heat from the core makes magma in the mantle RISE towards rge crust.
- As the hot currents nears the crust it begins ro cool and SINK back towards rge core.
- The magma sinking drags the plates across the surfsce of the earth, moving our tectonic plates
