Diamond, the Super Crystal!

The video explores the concept of rock hardness by comparing different rocks through scratching tests. It introduces diamonds as a type of crystal, explaining their unique structure and formation process. Diamonds are formed from carbon under extreme heat and pressure deep underground. The video also describes how diamonds are brought to the Earth's surface through volcanic-like eruptions and their eventual discovery by humans for use in jewelry and tools.

What is the main method used to test the hardness of rocks?

• By heating them

• By scratching them against each other

• By weighing them

• By soaking them in water

What is a diamond primarily made of?

• Silicon

• Iron

• Carbon

• Oxygen

How do carbon atoms need to be arranged to form a diamond?

• In a circular pattern

• In a regular repeating pattern

• In a random pattern

• In a zigzag pattern

Where do most diamonds form within the Earth?

• In the atmosphere

• Deep underground

• In the ocean

• Near the surface

How did diamonds reach closer to the Earth's surface?

• Through erosion

• By being carried by water

• Through volcanic-like eruptions

• By human excavation