CLEAN : UN chemical weapons experts arrive

What is a fundamental characteristic of crystals?

• They are always transparent.

• They have a repeating pattern.

• They are only found in nature.

• They are always colorless.

Which process is primarily responsible for the formation of crystals?

• Sublimation

• Crystallization

• Condensation

• Evaporation

Which of the following is NOT a type of crystal?

• Covalent

• Amorphous

• Metallic

• Ionic

In which field are crystals commonly used for their optical properties?

• Construction

• Photography

• Electronics

• Medicine

What is one of the main uses of crystals in technology?

• As a food preservative

• In timekeeping devices

• For building structures

• As a fuel source