4. Which of the following is considered to be a form of chemical weathering?
A. Rocks are broken into pieces using tools such as sledgehammer or mallet
B. Rocks break apart due to constant change in temperature
C. Roots of plants break down soils as it grows to the ground
D. Acid rain dissolves minerals found in rocks
5. Which of the following processes can produce a diamond?
A. Sedimentation
C. Metamorphism
B. Compaction
D. Melting​