How to Make Fog

When cool air moves over warm land, fog results. This is because water that evaporates from the warm land rises and when it reaches the cool air, it slows down, sticks together or condenses. Follow these easy steps to make your own fog.

Things You'll Need

• Empty 2-liter pop bottle
• Hot water
• A few drops of rubbing alcohol
• Ice cube
• Medicine dropper

Instructions

1. Find a 2-liter pop bottle, and rinse it out. Add very hot water until it is a third full.

2. Use a medicine dropper to suck up some rubbing alcohol. Drop a few drops of alcohol into the pop bottle.

3. Get an ice cube, and hold it over the opening in the bottle. Observe what happens.

4. Write down your observations on a piece of paper. Record why the fog forms.

5. Ask yourself why fog formed instead of rain. Write down your conclusions.

Tips & Warnings

• For Halloween or other spooky occasions, put some dry ice into a Crock-Pot and pour hot water over it. Keep your Crock-Pot turned on high enough to keep the water hot. This should produce a continuous fog.

• If you don't have a Crock-Pot, you can buy a fog machine. You can purchase one online.

• If you don't have a Crock-Pot or fog machine, you can use a bucket for your dry ice. However, you will have to keep pouring hot water over it when the fog stops.

• If you don't know where to find dry ice, look up "ice" in your yellow pages.

• Use heavy-duty tongs and gloves when handling dry ice. If you touch it, it burns.