extra credit

In the video, I used a charged balloon to make the water bend. This happens because as the balloon rubs against my head, it gains electrons from my hair. The rubber balloon is an insulator so all the electrons stay in one place and don’t spread around the balloon. The electrons cause a negative charge on the balloon. When the balloon comes close to the water, the positive charges in the water move closer the balloon because opposites attract. The negative charges move away from the balloon because like charges push each other away. This polarization of the water causes it to bend because the pull of the positive water and negative balloon is stronger than the repulsive forces of the negative charges.