Test part 1- Weathering and Soil
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what is mechanical weathering?
breaking down of rock by physical forces
what is weathering?
the constant breaking down of materials on earth
what are some examples of mechanical weathering?
breaking, crashing, pounding, cracking of rock
what type of forces can affect the rate of mechanical weathering
• temperature: (heating causes expansion of rocks) • organic activity: (roots forming and breaking through rock • frost: (cooling of ice and side of rock will expand and crack the rock, pot holes) • gravity: (pills on rocks util they move and crash on each other.. landslides) • abrasion: ( sand moving over the surface of a rock makes it smooth over time)
what is chemical weathering?
weathering by chemical changes (reactions and change in chemical composition) that will break down or dissolve rock
what are some agents of chemical weathering?
• water and carbon dioxide: will either dissolve rock or form a acid which will erode the rock • oxidation: oxygen will react with the rock to form a new molecule • sulfuric acid: when water combine with sulfur it forms