If you're in grade 8 and you need help in science Check out these pages.
Cells
http://www.angelfire.com/ego/mr.f/SubjectLinks/science/cells/main.html
Fluids
http://www.angelfire.com/ego/mr.f/SubjectLinks/science/fluids/main.html
Water Systems
http://www.angelfire.com/ego/mr.f/SubjectLinks/science/watersystems/main.html
Systems in Action
http://www.angelfire.com/ego/mr.f/SubjectLinks/science/systemsinaction/main.html
Did you Know that North America has five water basins.