To make a tornado in a bottle, fill one 2L bottle 2/3 full with water and glitter, attach a second bottle upside-down to the top with tape, then quickly turn the bottles upside-down and shake to create swirling glitter that mimics a tornado. The document also explains that real-world tornadoes form from opposing wind currents during thunderstorms that spin horizontally and increase in speed.

1. How to Make a Tornado in a Bottle
Materials:
Two 2L soda bottles
Glitter
1.3L water
1 plastic teaspoon
1 roll of tape
1 pair of scissors
Method:
1. Collect materials.
2. Take lid and paper from the bottles.
3. Pour water into 1 bottle until it is 2/3 full.
4. Put 2 tablespoons of glitter into the water.
5. Put another bottle on that bottle.
6. Tape on the middle of the bottlestogether at their tops.
7. Grab the bottom of one bottle and grab the middle of the 2 bottles.
8. Quickly turn upside-down and shake in a circular motion.
Discussion:
How do tornadoes happen in the real world?
Tornadoes are made of air. Theyspin at hundreds of kilometers per hour.
Theyhappens during thunderstorms. Winds move in opposite ways and then
spin horizontally. As the tornado spins, it speeds up.