212 °F Water Boils 100 °F Hot Summer Day 32 °F Water Freezes -20 °F Winter Day in Logan -238 °F Cryogenic Range -297 °F Oxygen Liquefies -321 °F Nitrogen Liquefies -423 °F Hydrogen Liquefies -453 °F Absolute Zero, Electrons in atoms stop moving

Cryogenic Treatments Strengthening Metal - More wear resistant –Saws –Knifes –Surgical and dental equipment –Golf Clubs –Cars – engines and brakes –Gun Barrels Musical Insturments – Crisper Sound –Trumpets –Violin Strings Computer Components

Demonstrations- notes only Begin freezing the banana, racquet ball, and rose at the beginning of the class. Overhead slides Demonstrate bouncing ball and begin freezing balls to give to the girls Punch a pinhole in a ping-pong ball and fill with N2. Drop on floor and watch it propel itself. Show the Argon balloon Smash racquet ball Smash banana Hammer nail with banana Smash the rose as the finale Make ice cream Hand out frozen balls to the girls in Dixie cups

Recipe 10 cups for a class of 20 girls –5 c. milk –2 c. cream (heavy or whipping) –1 tsp vanilla –1 c. sugar –Syrup for topping

What to bring Rachel Newell –Thermal Gloves (3 pairs min) –Insulated bowls (3 tall, 9 short) –N2 dewars (3) –N2 tank (1, from US Welding) –Spigot for N2 tank –Safety goggles (9 pairs min) –Metal Tongs (3 pairs) –Fill balloons with Argon –Overhead slides Sarah Hiza –Racquet balls (need 18, already have 3) –Wood board & nails (3 boards) –Ping Pong Balls with pin holes (18) –Balloons (18) –Roses (9) –1 metal mixing bowl –Measuring cup Dawn McCary –Ice Cream ingredients/toppings –Bananas (9) –1 metal mixing bowl –Measuring cup Ronda Devereaux –Wood spoons (3) –1 metal mixing bowl –Measuring cup –2 projectors and responsible for coordinating laptops –Bouncing balls (180) Erin Loschen –Plastic Spoons (200) –Plastic Cups (200) –Napkins/Paper Towels (200) –Dixie Cups (180) School provide –dust pan, broom, slide screen, tile floor