Which object will touch the ground first?

We started our science experiments looking at gravity this week. We wrote a report about what would happen if we dropped 6 different objects off the senior playground and hypothesised that the heaviest object will hit the ground first. Here's what happened:

The soccer ball hit the ground first! We talked about whether this experiment was a fair test and decided that because of the conditions and the way that the objects were dropped it was not. We gathered back inside to watch this video of a very fair test...