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Weathering

QuestionAnswer
What is weathering ? Weathering is the breaking down or dissolving of rocks and minerals on the Earths surface.
What are the three types of weathering ? Chemical, physical and biological
What is an example of mechanical weathering ? Freeze thaw action.
What is freeze thaw and action ? Its when water gathers in the cracks of rocks during the day. At night if the temperature drops below 0 degrees, the water freezes and becomes ice. This puts pressure on the rock as the ice can expand by up to 10%. If it keeps on repeating it can result i
what is mechanical weathering ? Mechanical weathering is the psychical breaking down of rocks into smaller pieces.
what is chemical weathering ? Chemical weathering is caused by chemical changes, when rock is dissolved or decays.
what is an example of chemical weathering ? carbonation
what is carbonation ? As rain water falls and passes through the air, it dissolves carbon dioxide. Carbon dioxide mixes with rainwater to form a weak carbonic acid. Limestone in the ground contains calcium carbonate. When the weak carbonic acid in rainwater falls onto limesto
What are karst landscapes They are areas of land made up of limestone.
Name an example of a karst landscape The Burren in co. Clare
What are the surface features of a karst landscape ? The bare, rocky karst surface is called a limestone pavement, the pavement is made up of clints and grikes
What are clints ? Lints are the slabs of rock on the surface that separate the grikes
what are grikes grimes are deep grooves in the pavement
what are terraces terraces are areas of sloping land that look like steps. They can be separated by steep cliffs.
what are the underground features of a karst landscape there are passages, caves, stalactites, stalagmites and pillars
which are stalactites and which are stalagmites stalactites hang from the roof of the cave and stalagmites are on the floor. When the two connect they form what is called a pillar.
What is biological weathering ? biological weathering takes place when rocks are worn away by animals, plants and living organisms.
Created by: Katie looney
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