Which action describes a chemical change? A.) Crushing Rock

B.) Lighting a Match

C.) Freezing Water

D.) Melting Ice

B

Explanation:

a chemical change is something that can not be reversed, so you may think crushing a rock but it isn't because crushing a rock is a phisical change not chemical and if you freeze water you can melt it and of you melt ice you can freeze it, so those can be reversed. So the answer is B because that can not be reversed

that tool would be a compass

answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!