Water the Plant
Rube Goldberg machines like ours are a whole bunch of chain reactions put together to make something happen. The video below is another example.
Rube Goldberg machines are related to physical science because in building one you have to think about how much force is required to hit an object and what simple machines you will use to help you. Our project ended up not working, but these are fun to make and show off in class or to your friends