The Winona Public Library presents this list. Check them out at your local library. This can be a big problem for people who live up north. The purpose of a refrigerator is to slow down the growth of bacteria. The purpose of a freezer is to stop bacteria completely by freezing them solid.
Dry ice is frozen carbon dioxide.
You can also calculate the wind chill factor if you know how fast the wind is blowing. Just one of the topics on the FIND OUT WHY site of the National Science Foundation produced in collaboration with Discover Magazine. Find out why.