Explain how plastic wrap works so that it sticks to the bowl.
*Hint: Think about what happened when we pulled two pieces of tape apart.
When the plastic wrap is unrolled, it pulls off electrons and becomes negatively charged. This INDUCES a charge on the surface of the bowl because even though the bowl is neutrally charged, the negative charges move away from the plastic wrap which makes the area closest to the plastic wrap positively charged.
The picture above shows how the negative charges move away from the charged object on the left.