Question

38. How many of the following methods can be used to learn about rock?
(1) Putting a rock in acid to find out what is in the rock
(2)Dropping a rock from a high place to learn how hard the rock is
(3) Looking at a rock with a hand lens to learn what is in the rock.
(4)Scratching a rock with a paperellp to learn how hard it is​

Answer 1

Answer:

all of the above is ur answer

pls marks as brainlinist