How Do Submarines Work?

The video explains how submarines work, focusing on buoyancy and density principles. It describes how submarines dive using ballast tanks and return to the surface by expelling water and using compressed air. The video also highlights the role of submarines in ocean exploration, discovering various marine life forms.

What determines whether an object will float or sink in water?

• Its density

• Its color

• Its shape

• Its temperature

How do submarines manage to dive underwater?

• By changing their shape

• By filling ballast tanks with water

• By increasing their speed

• By using propellers

What is the purpose of ballast tanks in a submarine?

• To adjust the submarine's density

• To hold extra fuel

• To provide sleeping quarters

• To store food

What is one of the main uses of submarines in real life?

• Building underwater cities

• Exploring outer space

• Studying marine life

• Transporting goods

How do submarines return to the surface after diving?

• By swimming upwards

• By using a crane

• By pushing air into the ballast tanks

• By releasing air from the ballast tanks