Question

Acidic water can react with limestone to break the rock down and form caves in the Earth's surface. This is an example of _______, which happens _______ over time. A. physical weathering, quickly B. physical weathering, slowly C. chemical weathering, quickly D. chemical weathering, slowly

Answer 1

B. Because a physical reaction is a change that can be seen. This particular situation is happening over a period of time, it isn’t something that happens instantly. Also I it would have been a chemical reaction, it would have mentioned something about the state of an element or the temperature or something along those lines.