Rocks Flashcards
What is erosion?
Erosion is the removal of the land’s surface. It is caused by rivers, wind, water and ice.
What is Hydraulic Action?
Hydraulic Action is the force of water against rock’s surface and can cause air to be trapped in cracks. The pressure weakens the rock and gradually wears it away.
What is Abrasion?
Abrasion is when rocks and stones are thrown at the rock’s surface. They scrape along the rock’s surface . This action is like sandpaper,
What is Attrition?
Attrition is when rocks and stones knock together and wear each other away
What is Solution?
Solution is when water dissolves the surface of a rock
What is weathering?
Weathering is the slow breakdown of rocks on the Earth’s surface . This is caused by weather conditions such as rain or changes in temperature and sometimes plants and animals.
What is Biological Weathering?
Biological Weathering is when burrowing animals such as rabbits can burrow into a crack in a rock, making it bigger and splitting the rock. Plant roots can grow in cracks, opening the cracks in the rocks.
What is Chemical Weathering?
Chemical Weathering is when carbon dioxide dissolves itself in rain making it slightly acidic. Minerals in rocks may react with the rainwater, causing the rock to be weathered.
What is Mechanical/Physical Weathering?
Mechanical/Physical Weathering is when water gets into rocks and freezes;it expands and opens the rock and pushes the rock further apart. When the ice melts, water gets further into the crack. The process repeats. This is called freeze-thaw weathering.
