Rocks Properties and Uses

Basalt is rich in which two elements?

• Calcium and Sodium

• Magnesium and Iron

• Silicon and Oxygen

Gneiss has a foliated texture due to ______.

• random mineral arrangement

• distinct bands of minerals

• smooth surface

• glassy appearance

What is the typical color of obsidian?

• Blue

• Black

• White

• Yellow

On the Mohs scale, what is the hardness of obsidian?

• 3-4

• 5-5.5

• 6-7

• 8-9

On the Mohs scale, what is the hardness of slate?

• 1

• 3

• 5

• 7

Slate looks similar to which rock but is stronger?

• Granite

• Shale

• Marble

• Basalt

What is the typical color of pumice?

• Dark gray

• Light gray or white

• Red

• Black

What is one use of pumice as an abrasive?

• In food

• In cleaning products and polishes

• In textiles

• In electronics

Pumice is used in lightweight construction material such as:

• Heavy concrete

• Lightweight concrete and plaster

• Metal structures

• Wooden frames

The vesicular texture of pumice is due to:

• Large crystals

• Small holes or vesicles

• Smooth surface

• Layered structure