1. Weathering – Ch. 7, Section 1
Mechanical Weathering
1 -_____________: rocks are broken apart; new rocks are similar to original rocks
2 - ____________: water freezes in rock cracks
3 - ___________: roots force into cracks, then grow & break rock
4- ______________: digging, scratching at rocks, causing rocks to move
Chemical Weathering
1 -___________: dissolves or changes the minerals; new rocks are different from orig. rocks
2 - ___________: carbonic acid dissolves rock, creating caves
3 - ___________: oxygen & water react w/ minerals to break down into rust
4 - ___________ from decaying plants weakens rocks