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.
(11) Dropping a rock from a high place to learn how hard the rockis.
(9) Looking at a rock with a hand lens to learn what is in the rock.
(iv) Scratching a rock with a paperclip to learn how hard it is.​

Answer 1

Answer:

all are important steps

Answer 2

Step-by-step explanation:

Can you identify my rock or mineral?

1. Your state geological survey.
2. A natural science museum.
3. A college or university with a geology department.
4. A rockshop.
5. Members of a local Gem & Mineral club or Rockhunting club (many hobbyists are experts at identification)
6. Vendors at a Gem & Mineral show.