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Description
Flashcards by Ahmed Almohammed, updated more than 1 year ago
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Created by Ahmed Almohammed
over 7 years ago
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| Question | Answer |
| What happens deep within the Earth? | Deep within the Earth, cycles occur that influence what happens on the surface of the Earth. |
| Why do Earthquakes, volcanoes and continental drift all occur? | Earthquakes, volcanoes and continental drift all occur because of energy flows within our planet. |
| What is the process of tectonic drift? | Tectonic drift is the process by which the enormous tectonic plates on the surface of the earth move and collide with one another. |
| What are tectonic plates? | Tectonic plates are enormous of plates of rock, the size of continents, that make up the Earth's crust and are very slowly moving. |
| What results from these plate movements? | Earthquakes and volcanoes result from these plate movements. |
| How many cm a year do these tectonic plates move? | Although the movements are quite slow, just a few centimetres per year in most cases. |
| What are the three types of tectonic plates? | |
| What would happen to the movement of the tectonic plates if the centre of the earth solidified? | If the whole planet was solid, it would be even more difficult to move the plates and require even more extreme force. |
| What are the 4 layers of the Earth? | |
| 1.) What is the crust layer of the Earth? | The uppermost thin layer of the Earth, which we live and which also makes up the tectonic plates. |
| 2.) What is the mantle layer of the Earth? | The Mantle layer is the soft (but not liquid) layer of rock between the crust and the outer core of the earth. |
| 3.) What is the outer core layer of the earth? | The outer core layer of the earth is the layer of liquid rock between the mantle and the inner core of the earth. |
| 4.) What is the inner core layer of the earth? | The inner core layer is the solid innermost layer of the earth. |
| Where does the energy in the inner layers of the Earth comes from? | One source is the ongoing decay of radioactive substances within the earth. The another source of energy is the leftover heat from the time when the Earth formed. |
| What are the stages of the formation of the solar system? | It started as a nebula, a cloud of gas and dust.The sun formed in the centre of this cloud, and heat and pressure started its nuclear fusion reactions. The other planets were formed gravitationally further out in the solar system. |
| Formation of the Solar System Detailed | |
| How did scientists come to a conclusion that the inner core is believed to be a single immense iron crystal? | Some scientists believe the inner core is a single immense iron crystal as it contains a high proportion and amount of iron. |
| Why is it that the inner core of the earth is solid, despite the fact that its made of iron and is at a temperature four times the melting point of iron? | This is because the immense pressure from the whole mass of the earth pushing down on it enables the inner core to remain solid. |
| What provides energy for the movement of the tectonic plates on the surface? | The currents of molten rock moving within the outer core provide the energy for the movement of the tectonic plates. |
| Why cannot we access the resources within the inner core? | This is because no-one has travelled, or even drilled, deeper than the level of the crust. |
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