LESSON 3 Minerals and Rocks Quiz

Which of the following properties shows the color of the powdered form of rocks and minerals?

• effervescence

• hardness

• cooling rate

• streak

Which of the properties below would be the least reliable basis for the identification of minerals?

• color

• hardness

• cooling rate

• streak

What type of rock is formed when pieces of older rocks and loose materials get pressed together?

• igneous

• metamorphic

• sedimentary

• sand

According to the Mohs scale, which of the following pairs of minerals corresponds to the hardest and the softest?

• diamond – apatite

• diamond – talc

• calcite – topaz

• topaz – diamond

Obsidian and granite are both igneous rocks. Which of the properties below explains why obsidian is black, shiny, and has no crystals, while granite has large visible crystals?

• color

• hardness

• cooling rate

• streak

TRUE about Minerals:

• Inorganic

• Naturally occuring

• With chemical composition

• All of the above

Refers to a mineral’s ability to scratch another mineral or be scratched by another mineral.

• Luster

• Hardness

• Streak

• Specific gravity

The basic building blocks of rocks:

• Crystal

• Acids

• Magma

• Minerals

Example of Extrusive rock:

• Pumice

• Gabbro

• Diorite

• Granite

Characteristics of intrusive igneous rock:

• Rapid cooling

• glassy texture

• coarsed grain

• Fine grain