1.which is a factor of mechanical weathering
a. acid rain b. carbon dioxide c. living organisms d. oxygen
2.rocks that are made of_____ can be broken down when carbon dioxide in air combines with water to form carbon acid.
a.acid b.calcite c.iron d.rust
3.what is the color of the surface of rocks that undergo combination of oxygen and iron that makes them weak?
a.black b.gray c.rusty colored d.white
4.which process involves the breaking down of rocks by winds, water,temparature,and living organism?
a.chemical eathering b.deposition c.erosion d. mechanical weathering
5.how do plants contribute to weathering?
a.plants expand when cooled
b.plants contract when heated
c.roots remove the minerals of rocks
d. roots of the plants grow into small spaces and gaps of rocks
6.It is a place where stones are extracted by humans
a.open field b.quarry c.reservoir d.road

pls pasagot po ng maayos kailangan kona po kase ito eh