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1. _______name of lab safety symbol that has a picure of a plant (lab safety)

2. ______the process scientists use to solve problems and answer questions (scientific method)

3. _______a naturally formed inorganic solid with a crystalline structure (minerals)

4. _______last step of the scientific method (scientific method)

5. _______a minerals resistance to being scratched (minerals)

RAP: Choose the best word. (cleavage or color) 1. ________ is not a good identifier for identifying minerals.2. The highest number on the Moh’s Hardness Scale is the number _______.

Key Questions

1. What is Mohs hardness scale? 2. What does the scale use to represent

variations in hardness? 3. What are some common items used to

test hardness?

1.Mohs Hardness Scale-a scale to identify minerals based on their hardness or resistance to being scratched

2. The scale uses 10 minerals to represent variations in hardness.

3. The common items used to test hardness are

a fingernail a penny Glass Steel nail