How Stuff Works - Submarines

What helps submarines dive underwater?

 

• Filling the ballast tanks with water

• Adding more crew members

• Turning off the engines

• Using a special type of fish

What does buoyancy describe?

• The weight of an object

• An object's floatability

• The speed of an object

• The temperature of water

3. What system do submarines use to navigate underwater?

 

• GPS

• SONAR

• Radar

• Wi-Fi

What happens when a submarine fills its ballast tanks with air?

• It sinks deeper

• It stays in the same position

• It rises to the surface

• It loses power

What is the acronym SONAR short for?

• Sound, Navigation, and Rescue

• Sound, Navigation, and Ranging

• Sonar, Navigation, and Reaching

• Sound, Nurturing, and Ranging