Question

minerals & identification quiz

1. which of the following is not a characteristic of minerals?

a. naturally occurring
b. inorganic
c. made by humans
d. definite chemical composition

1. what is the hardest mineral on the mohs scale?

a. quartz
b. diamond
c. corundum
d. topaz

1. the softest mineral on the mohs scale is:

a. talc
b. gypsum
c. calcite
d. fluorite

1. what does the streak test show?

a. mineral’s luster
b. mineral’s density
c. color of powdered mineral
d. mineral’s hardness

which property describes how a mineral reflects light?

Explanation:

Question 1

Minerals are naturally occurring, inorganic, and have a definite chemical composition. They are not made by humans (human - made substances are not minerals). So the option that is not a characteristic of minerals is "Made by humans".

The Mohs scale of mineral hardness is a qualitative ordinal scale. Diamond is known to be the hardest mineral on this scale, with a hardness of 10. Quartz has a hardness of 7, corundum has a hardness of 9, and topaz has a hardness of 8.

On the Mohs scale, talc is the softest mineral with a hardness of 1. Gypsum has a hardness of 2, calcite has a hardness of 3, and fluorite has a hardness of 4.

Answer:

C. Made by humans

Question 2