Activity 17 Minerals in Rocks

Front

What is a mineral?

Back

A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure.

Front

What is the difference between a rock and a mineral?

Back

A rock is a solid material composed of one or more minerals, while a mineral is a single substance with a specific chemical composition.

Front

What is calcite?

Back

Calcite is a common mineral made of calcium carbonate (CaCO3) and is often found in sedimentary rocks like limestone.

Front

What is quartz?

Back

Quartz is a hard, crystalline mineral composed of silicon dioxide (SiO2) and is one of the most abundant minerals in the Earth's crust.

Front

What is granite?

Back

Granite is an igneous rock composed mainly of quartz, feldspar, and mica, known for its durability and use in construction.

Front

What is limestone?

Back

Limestone is a sedimentary rock primarily composed of calcite, often formed from the remains of marine organisms.

Front

What is streak color?

Back

Streak color is the color of the powder left behind when a mineral is scraped across a hard surface, which can help identify the mineral.

Front

What is transparency in minerals?

Back

Transparency refers to how much light can pass through a mineral; it can be classified as transparent, translucent, or opaque.

Front

What is luster in minerals?

Back

Luster describes how light reflects off the surface of a mineral, categorized as metallic, glassy, pearly, or dull.

Front

What is the Mohs scale?

Back

The Mohs scale is a scale from 1 to 10 used to measure the hardness of minerals, with talc being the softest (1) and diamond the hardest (10).