Topic 4 Lesson 3 Rocks, Minerals, and Soil

Front

What is the definition of streak in mineralogy?

Back

Streak is the color of the powder left when a mineral is rubbed on a streak plate. It can help identify the mineral.

Front

How is hardness defined in the context of minerals?

Back

Hardness is a measure of a mineral's resistance to scratching, often assessed using the Mohs scale.

Front

What mineral is known for being easily scratched with a fingernail?

Back

Talc is known for being easily scratched with a fingernail, indicating its low hardness.

Front

What is the best soil profile for growing vegetable plants?

Back

Profile 2 is typically the best soil profile for growing vegetable plants due to its nutrient content and drainage.

Front

What does luster refer to in mineral properties?

Back

Luster describes how a mineral reflects light, which can be described as metallic, glassy, waxy, or greasy.

Front

What is the Mohs scale used for?

Back

The Mohs scale is used to rank minerals based on their hardness, from 1 (talc) to 10 (diamond).

Front

What is the significance of a mineral's color?

Back

A mineral's color can provide clues to its identity, but it is not always reliable due to variations.

Front

What is the difference between cleavage and fracture in minerals?

Back

Cleavage is the tendency of a mineral to break along flat surfaces, while fracture refers to irregular breakage.

Front

What are the common types of luster found in minerals?

Back

Common types of luster include metallic, vitreous (glassy), pearly, silky, and dull.

Front

How can you test a mineral's streak?

Back

To test a mineral's streak, rub the mineral on a piece of unglazed porcelain and observe the color of the powder left behind.