1. Weathering breaks down rock into small particles, or sediment. Forces of erosion (water, wind, ice, or gravity) carry and move these pieces. The earth's surface is constantly changing because some rock is worn away, and then after erosion deposits the rock, new rock can be formed in a different location.
2. Mechanical weathering physically breaks rock into smaller pieces, but chemical weathering breaks rock down through chemical changes.
3 and4. SEE TABLES
5. Two aspects of the type of rock can change the rate of weathering: mineral composition and perm ability.
The mineral composition in important because only some minerals are soluble (able to dissolve) in water. If a rock contains minerals that are soluble in water, then it will weather more quickly.
Permeability is important because if a rock is permeable, water can seep into the rock. Water can then weather the rock more quickly because it can weather the inside of the rock too.
6. Climate can affect the rate of weathering. Weathering occurs more quickly in hotter climate than cold one (because chemical reactions happen faster at warmer temperatures. Weathering also occurs more quickly in wet climate (water is necessary for chemical weathering and for freezing and thawing to occur). The type of climate in which rock weathers the fastest is a hot and wet climate.
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