geomorphological processes

0 18 flashcards shreerithighaa826

start learning

download mp3 print play test yourself

Question		Answer
rocks start learning		there are three types of rock igneous metamorphic sedimentary rocks
igneous rock start learning		igneous rocks are formed from molten rocks
the two types of igneous rocks start learning		the molten rock which erupts onto the Earth's surface is called lava. lava cools to form rocks with smaller crystals example basalt
another type of igneous rock start learning		the molten rock found under the Earth's surface is called magma. magma cools slowly to form rocks with larger crystals. example granite
metamorphic rocks start learning		formed from other rocks as a result of volcanic action
volcanic activity start learning		rocks which come into contact with magma are heated and changed to new rocks
extreme pressure start learning		extreme pressure caused by tectonic movements can also alter rocks. example clay becomes slate
weathering start learning		the natural breakdown of rocks at the Earth's surface
physical weathering start learning		physical weathering happens when the weather breaks down rocks without altering them chemically
two key types start learning		freeze thaw weathring and onion skin weathering
freeze thaw weathering start learning		water seeps into cracks. temperature drops down below 0 degrees Celsius. water freezes and becomes ice. ice expands and creates pressure. pressure widens the crack.
onion skin weathering start learning		the high temperature heats the rock. surface of the rock expands. temperature drops down at night. rock contracts. the surface of the rock peels.
chemical weathering start learning		it involves chemical reactions between rain water and rocks.
biological weathering start learning		biological weathering is the breakdown of rocks by plants animals and insects
biological weathering by plants start learning		roots from trees and plants grow into the crack. the root widens the crack and breaks it
biological weathering by animals and insects start learning		creatures that live underground helps to break up softer rocks just as clay
erosion start learning		wearing away the land by wind, river, ice, sea
process of erosion start learning		attrition, abartion, hydraulic action, plucking

Create flashcards

You must sign in to write a comment