RUSSIA: MOSCOW: UN CHIEF KOFI ANNAN VISIT

What is a fundamental characteristic of crystals?

• They are always colorless.

• They have a repeating pattern.

• They are only found in nature.

• They are always transparent.

How do crystals typically form?

• By compression of gases.

• Through evaporation of gases.

• By the slow cooling of a liquid.

• Through rapid cooling of lava.

Which of the following is a type of crystal?

• Amorphous solid

• Plasma crystal

• Liquid crystal

• Gas crystal

In which field are crystals commonly used?

• Botany

• Electronics

• Astronomy

• Meteorology

What is one application of crystals in technology?

• They are used in wind turbines.

• They are used in water purification.

• They are used in computer chips.

• They are used in solar panels.