Inquiry based activity:
Fill one of the plastic bottles about ¾ full of water.
Add a couple of drops of food colouring.
Add about a teaspoon of glitter to the coloured water.
The glitter represents the dust in the tornado.
Tape the top of the empty bottle to the top of the bottle with the water.
Make sure the tape is secure around the bottle tops.
Turn the bottles around making sure the bottle with the water in it is on top.
Watch as the water flows from the top bottle into the bottom bottle.
The water flows slowly from the top bottle into the bottom bottle.
Also, air bubbles travel up through the water in the top bottle, making a noise.
Hold the bottles where they are connected and quickly swirl them in a circular motion for a few seconds. Stop and look inside the bottles. There will be a mini tornado in the top bottle as the water flows quickly and quietly into the bottom bottle.