Crystallisation

The video tutorial explains the process of rock and gemstone formation over geological time scales, highlighting how minerals can create spectacular formations in caves. It also illustrates a similar process on a much shorter timescale by showing how sugar crystals form in honey.

What geological process is responsible for the creation of rocks and gemstones?

• Cooling of liquids or gases

• Earthquakes

• Erosion of soil

• Volcanic eruptions

What is a common result of the cooling process over geological time scales?

• Formation of sand dunes

• Erosion of riverbanks

• Creation of gemstones

• Development of coral reefs

Where can one observe spectacular mineral formations?

• In the ocean

• In caves

• On mountain tops

• In deserts

Which of the following is an example of crystallization occurring over a short time?

• Formation of granite

• Sugar crystals forming in honey

• Growth of stalactites

• Formation of diamonds

How can the crystallization process be observed in everyday life?

• By seeing sugar crystals form in honey

• By observing sugar dissolve in water

• By watching ice melt

• By looking at rust forming on metal