Flashcards
The structure of the earth
Flashcards do conjunto (17)
- 1What is the outer layer of the earth called?Lithosphere
- 2Draw the structure of the earth.
- 3Lithosphere is made up of ......Tectonic plates
- 4How do we know what is beneath the crust?Seismic waves and man-made explosions.
- 5What does the mantle lie between?Core and the crust.
- 6The earths core transfers energy so......the temperature increases with depth.
- 7Convection currents......slowly move plates.
- 8Describe subduction.
- 9Why is the theory of plate tectonics now widely accepted my scientists?It explains a wide range of evidence and it has been discussed and tested by many scientists.
- 10Who's theory was not accepted?Wegner's continental drift theory in 1914
- 11How did it slowly become accepted?Sea floor spreading evidence in the 1960's.
- 12Why does magma rise up?It is less dense than the crust. It causes volcanoes.
- 13Magma can have different......compositions....eruptions.
- 14Why do geologists study volcanoes?To predict eruptions in the future.
- 15How are different types of igneous rock formed?Lava
- 16What does runny lava produce?Iron-rich basalt rock.
(slower eruptions) - 17What does thick lava produce?Silica-rich rhyolite rock.
(explosive eruptions)
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- GCSE Chemistry (C2) FlashCards sobre The structure of the earth, criado por mmit em 28-05-2013.
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