A B 11 1. These living organisms grow between the cracks of rocks causing the rocks to break into pieces 2. They contribute to weathering by using jackhammers to break boulder of rocks. 3. The repeated expansion and contraction of rocks that resulted in weathering. 4. When it gets colder, it expands and turn into ice and can trigger rocks to break. 5. They live underground and contribute to weathering by burrowing and digging deeper 6. It is the process where change in the chemical composition of rocks takes place. 7. It is the breaking down of rocks into smaller pieces 8. It is the physical wearing away of rocks 9. It carries sand or small rock particles that scratch the rocks' surface that resulted to different rock formations 10. An open-pit mine where rocks can be extracted. a. burrowing animals b. chemical weathering c. humans d. mechanical weathering e. plants f. quarry g. temperature h. water 1. wind j. weathering