The video tutorial explains that rocks are made of one or more minerals, with most rocks containing multiple types. Granite, a common building stone, is composed of minerals like feldspar, quartz, mica, and hornblende. Rocks are classified into three main groups based on their formation: igneous, sedimentary, and metamorphic. The video provides an introduction to these rock types, starting with igneous rocks.

What is granite commonly used for?

• Fuel

• Fertilizer

• Building stone

• Jewelry making

Which of the following minerals is NOT found in granite?

• Feldspar

• Quartz

• Mica

• Calcite

How are rocks primarily classified?

• By their color

• By their mineral content

• By their size

• By how they form

Which of the following is NOT a main group of rocks?

• Metamorphic

• Crystalline

• Sedimentary

• Igneous

What type of rock is introduced at the end of the video?

• Sedimentary

• Igneous

• Metamorphic

• Organic