COOL SCIENCE is HOT!

 

Matter has SOLID, LIQUID or GAS/VAPOR forms

 

Solid water is ICE, water VAPOR is STEAM

 

Water boils at 212° F/100° C. That’s HOT

 

Water freezes at 32°F/0° C. That’s COOL.

 

Air is 80% NITROGEN, 20% OXYGEN

Argon and Carbon Dioxide (CO2) also

 

GASES in air can be liquefied and frozen

(they cool by expanding)

 

Nitrogen boils at –321° F/-196° C. That’s COLD

 

At –321°F water freezes (FAST).

 

At –321°F atoms move slower and things are smaller.

 

At –321°F materials are harder and more brittle.

 

At –321°F magnets can be levitated by superconductivity.

 

At –321°F OXYGEN is LIQUID too.