Blubber Mitt Experiment

📋 What You'll Need

• •2 zip-top sandwich bags
• •Crisco or shortening (as 'blubber')
• •A bowl of ice water
• •Duct tape

👣 Step by Step

1. 1Fill one sandwich bag halfway with Crisco and seal it.
2. 2Turn the second bag inside out and place it inside the Crisco bag.
3. 3Zip the two bags together so the Crisco is sealed between them — this is your 'blubber mitt.'
4. 4Stick one bare hand in the ice water and count how many seconds until it feels cold.
5. 5Dry your hand, then put it inside the blubber mitt and stick it back in the ice water.
6. 6Count how many seconds until your hand feels cold this time.

🔍 What to Observe

• •How much longer could you keep your hand in the water with the blubber mitt?
• •Did the blubber mitt feel warm on your hand?
• •Why do manatees and whales need a thick blubber layer?