Problem 16
What is the color of a powdered mineral formed when rubbing it against an unglazed porcelain tile? A) luster B) density C) hardness D) streak
Problem 17
Which is hardest on Mohs scale? A) talc B) quartz C) diamond D) feldspar
Problem 19
Explain how minerals are useful to society. Describe some of their uses.
Problem 20
The mineral crystals in the rock above formed when magma cooled and are visible with the unaided eye. Hypothesize about how fast the magma cooled.
Problem 20
Suppose you let a sugar solution evaporate, leaving sugar crystals behind. Are these crystals minerals? Explain.
Problem 21
Will a diamond leave a streak on a streak plate? Explain.
Problem 21
What is a crystal system? Why is it useful to classify mineral crystals this way?
Problem 22
How can a mineral be identified using its physical properties?
Problem 22
Data Make an outline of how at least seven physical properties can be used to identify unknown minerals.
Problem 23
What is a crystal? Do all crystals have smooth crystal faces? Explain.
