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Description
Flashcards by Faiza Pathan, updated more than 1 year ago
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Created by Faiza Pathan
over 8 years ago
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| Question | Answer |
| What are the 4 layers of the Earth? | 1: Crust 2: Mantle 3: Inner Core 4: Outer Core 'COMI' |
| What is the CRUST? | 1: outer layer of the earth. 2: thin layer between 0-60 km thick. 3: Solid rock layer (What we live on) |
| What is the MANTLE? | 1: Widest section of the Earth 2: Diameter of approx. 2900 km. 3: Made of Semi molten rock and magma. Upper part: The rock is hard, Lower down: Rock is soft - Beginning to melt |
| What is the INNER CORE? | 1: In the center 2: Hottest part of the Earth 3: Solid 4: Made up of iron and nickel with temperatures of up to 5,500°C. 5: It is so hot, it is like the engine room of the Earth |
| What is the OUTER CORE? | 1: Layer surrounding inner core 2: Liquid layer 3: Made of Iron and Nickel 4: Still extremely hot (Similar to inner core) |
| What are the TWO types of CRUST that Plates are made of? | 1: Continental crust 2: Oceanic crust |
| Continental Crust | 1: Thicker 2: Less dense * Carries Land |
| Oceanic Crust | 1: Thinner 2: More dense * Carries Water |
| Diagram of the structure of the Earth (To see inside is called ' The cross section' | |
| What are Plates? | Are broken pieces of the Earth's Crust |
| What creates Convection Currents? | 1: Heat rising 2: Falling inside the mantle 3: Generated by radioactive decay in the core |
| What does Convection Currents do? | 1: Move the plates 2: When they diverge near the Earth's crust, plates move apart 3: When they converge, plates move towards each other. * Converge - Come together * Diverge - Go away from something |
| What is Plate Tectonics? | 1: Movement of the Plates 2: Activity inside the Earth |
| What does Plate Tectonics cause? | 1: Earthquakes 2: Volcanoes |
| What is a Plate Boundary? | The point where 2 plates meet * Volcanoes and Earthquakes more likely to occur on or near the plate boundary |
| Describe tensional, constructive and divergent boundary | * Plates are moving apart 1: Plates move apart ( V. Slowly) 2: Magma rises from the mantle 3: Magma erupts to the surface of the Earth 4: Magma reaches surface and it cools 5: Igneous rock is formed VOLCANO IS FORMED OVER TIME |
| Describe compressional and destructive boundary | * Plates are moving towards each other 1: Oceanic plate and Continental plate move together 2: As they move, Oceanic plate is force beneath the Continental 3: The point at which this happens is called SUBDUCTION ZONE 4: As Oceanic plate is forced below the continental plate, it melts 5: Magma is formed 6: Earthquakes are triggered 7 : Magma collects to form a magma chamber 8: Magma rises through cracks in the continental crust 9: Pressure builds up ( Risk of Volcanic eruption) |
| What creates Fold Mountains? | 1: Plates push together 2: Continental crust is squashed and forced upwards 3: Called Folding 4: Fold mountains created * Also can be formed if two continental plates push towards each other * |
| How do Plates move? | The plates move apart due to convection currents inside the Earth. |
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