Chemical weathering is when chemicals in rain and moving water react with rocks and minerals to change or weaken them in some way. Chemical weathering always causes some type of chemical reaction within the rock or mineral itself while, mechanical weathering breaks rocks into smaller pieces without changing their composition.
Chemical Weathering - occurs when chemical process cause rocks to dissolve.
Factors of Chemical Weathering:
Climate - wet & warm maximizes chemical reactions
Plants & Animals - living organisms secrete substances that react with rock
Time - Longer contact means greater change
Mineral Composition - some minerals are more susceptible to change than others
Mechanical Weathering/Physical Weathering - dis aggregation cause rocks to crumble.
Factors of Mechanical weathering:
Temperature - Surface rock is heated by sun. During the day, the rocks expand. At night, the rocks cools & contracts.
Water - Water can break rocks in different ways. The strong waves that hit the rocks can make them break. It can seep into the cracks of the rocks.
Wind - As the wind blows, it carries sand or small rock particles that scratch the rock's surface.
Plants - The seed of tree may sprout in the soil that has collected the in a cracked rock. As the roots grow, they widen the cracks, eventually breaking the rocks into pieces.
Animals - Animals that live underground also contribute to weathering. As burrowing animals such a rabbit,moles&badgersdigdeeper,they cause rocks to break into pieces too.
Humans - Humans activities are responsible for enormous amounts of mechanical weathering, by digging or blasting into rock to build homes, roads, subways, or to quarry stone.
Answers & Comments
Answer:
Chemical weathering is when chemicals in rain and moving water react with rocks and minerals to change or weaken them in some way. Chemical weathering always causes some type of chemical reaction within the rock or mineral itself while, mechanical weathering breaks rocks into smaller pieces without changing their composition.
Answer:
Chemical Weathering - occurs when chemical process cause rocks to dissolve.
Factors of Chemical Weathering:
Mechanical Weathering/Physical Weathering - dis aggregation cause rocks to crumble.
Factors of Mechanical weathering: