The Kessler effect suggests that when the amount of space debris in Low Earth Orbit (LEO) reaches a certain level, it will trigger a cascade effect in which this debris will be constantly colliding and breaking up to multiply the amount of debris, creating a permanent danger for any satellite of spacecraft in orbit.
Doing this for a physics project, Hello Mr. S! the instructions are the first thing that happens when you google the Kessler Effect. Credit Solar MEMS Technology.