Causes of weathering
The actual pushing or breaking of a rock
Acid eats away at rock and actually dissolves it.
Plants sometimes give off acids
Combinations of minerals have acidic effects
Humans spilling chemicals (like soda)
Dead animals sometimes give off acids
The moving of weathered sediment from place to place
Agents of Erosion
GRAVITY- The most common agent-
Things fall down….. landslides, mudslides or just plain movement downhill are all caused by gravity, a pull downward.
As wind and water and even acid weather rocks on mountains, it loosens the fragments, gravity pulls them downward so they fall down the mountain. This is why mountains are wider on the bottom and narrow on top.