Giant Crystal Cave Quiz

What is the largest size of the crystals found in the Giant Crystal Cave?

• 12 meters long (~36 feet)

• 0.5 meters long (~1.5 feet)

• 2 meters long (~6 feet)

• 50 meters long (~150 feet)

What was the initial purpose of the mining company in Naica, Mexico?

• To study ancient caves

• To explore volcanic activity

• To discover giant crystals

• To find lead, zinc, or silver

What is the main mineral composition of the crystals in the Giant Crystal Cave?

• Quartz

• Calcite

• Selenite

• Halite

What is the temperature inside the Giant Crystal Cave on a good day?

• 45 degrees Celsius

• 58 degrees Celsius

• 72 degrees Celsius

• 30 degrees Celsius

Why can humans only survive for about ten minutes unprotected in the cave?

• Because of high temperatures and humidity

• Due to low oxygen levels

• Because of toxic gases

• Due to high radiation levels

What special equipment do scientists use to study the cave?

• Heat-resistant suits

• Refrigeration suits

• Radiation suits

• Diving suits

What geological process contributed to the formation of the Naica mountain?

• Glacial activity

• Volcanic activity

• Tectonic plate movement

• Erosion

What is anhydrite?

• A hydrated form of gypsum

• A type of volcanic rock

• A type of crystal

• A dehydrated form of gypsum

What happens to anhydrite at or below 58 degrees Celsius?

• It becomes stable

• It dissolves and reforms into gypsum

• It turns into quartz

• It evaporates

What will happen to the crystals when the mine eventually closes?

• They will stop growing

• They will dissolve

• They will start growing again

• They will shrink