Understanding Dry Ice

What is dry ice made of?

• Solid water

• Solid oxygen

• Solid carbon dioxide

• Solid nitrogen

What is the surface temperature of dry ice?

• 0 degrees Celsius

• -50 degrees Celsius

• -100 degrees Celsius

• -78 degrees Celsius

How does dry ice compare in temperature to ordinary ice?

• The same

• Much cooler

• Warmer

• Slightly cooler

What can happen if dry ice touches your skin?

• No effect

• Burns

• Mild cold

• Severe frostbite

Why shouldn't dry ice be stored in airtight containers?

• It melts

• It becomes heavier

• No reason

• Can cause explosion

What happens to dry ice when it changes state?

• Condenses

• Sublimates

• Melts

• Freezes

What does sublimation mean for dry ice?

• Changes from solid to gas

• Changes from gas to solid

• Changes from solid to liquid

• Changes from liquid to gas

What can build up inside an airtight container with dry ice?

• Gas pressure

• Heat

• Liquid

• Vacuum