What is. .

the changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products.

example: adding sodium metal to chlorine gas to get salt.

[starts with ch]

2%? i tried finding the exact sorry if it's not 100% correct ; -;

b) the inside picture would look at a very high temperature in a very low ph

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101