1. Acid rain changes the minerals in rocks to other minerals. What is this process called?

Question

a. chemical weathering *******
b. deposition
c. erosion
d. physical weathering

2. Which of the following was formed by erosion?
a. the Great Plains
b. the Hawaiian Islands
c. the Grand Canyon *******
d. the Mississippi delta

3. Which is NOT a cause of chemical weathering?
a. acid
b. water
c. oxygen ********
d. carbon dioxide

Answer 1

The first two are right, but I'm confused on the last one because I think all of them are causes of chemical weathering.

Answer 2

I agree that the first two are correct. Here is a site that lists acid rain, water, oxygen, and carbon dioxide as the four major types of chemical weathering.
https://courses.lumenlearning.com/geo/chapter/reading-chemical-weathering/

Answer 3

water******* is the last one!
Thank you DrBob222 and Emily

Answer 4

Well the third one is wrong.. the answer they are looking for is water