Run the hardness scale

Exercise and reference answers

Questions

1. Correct

   1

   Choices

   1. 1
   2. 3
   3. 7

2. Correct

   3

   Choices

   1. 1
   2. 3
   3. 7

3. Correct

   7

   Choices

   1. 1
   2. 3
   3. 7

4. Correct

   8

   Choices

   1. 8
   2. 9
   3. 10

5. Correct

   9

   Choices

   1. 8
   2. 9
   3. 10

6. Correct

   10

   Choices

   1. 8
   2. 9
   3. 10

Instructions

Pick the lane with the right hardness number for each mineral.

Explanation