Test part 1- Weathering and Soil

Question 0

what is mechanical weathering?

Answer 0

breaking down of rock by physical forces

Question 1

what is weathering?

Answer 1

the constant breaking down of materials on earth

Question 2

what are some examples of mechanical weathering?

Answer 2

breaking, crashing, pounding, cracking of rock

Question 3

what type of forces can affect the rate of mechanical weathering

Answer 3

• 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)

Question 4

what is chemical weathering?

Answer 4

weathering by chemical changes (reactions and change in chemical composition) that will break down or dissolve rock

Question 5

what are some agents of chemical weathering?

Answer 5

• 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