How Do Ships Float?
Archimedes' principle: an object floats when it displaces water equal to its own weight.
How Do Ships Steer?
Using a rudder at the back that deflects water, pushing the stern the opposite way.
How Do Submarines Dive and Surface?
Buoyancy, ballast tanks, and how submarines control their depth underwater.
How Do Water Filters Work?
Using physical barriers, chemicals, or biological processes to remove impurities.
What is a Hydroelectric Dam?
Generating electricity by harnessing the kinetic energy of falling water.