The video explains the importance of not holding your breath while scuba diving due to pressure changes underwater. It uses a balloon experiment to demonstrate how pressure affects air volume at different depths. The video emphasizes that scuba diving is safe if rules are followed, and highlights the potential dangers of holding your breath during a dive. It concludes with a call to action for viewers to engage with the channel.

Why is it important not to hold your breath while scuba diving?

• It affects your buoyancy.

• It makes you swim slower.

• It can lead to lung over-expansion.

• It can cause dizziness.

What is a common misconception about the dangers of scuba diving?

• It is safe to hold your breath while ascending.

• It is less likely to cause accidents than falling coconuts.

• It is a high-risk sport if rules are followed.

• It is more dangerous than skydiving.

What is the pressure at 20 meters underwater?

• 4 bar

• 3 bar

• 2 bar

• 1 bar

What is the pressure at 30 meters underwater?

• 3 bar

• 5 bar

• 2 bar

• 4 bar

How does the volume of a balloon change as it is taken deeper underwater?

• It bursts immediately.

• It decreases.

• It stays the same.

• It increases.

What happens to the volume of a balloon when it is brought back to the surface from 10 meters deep?

• It becomes smaller.

• It returns to its original size.

• It bursts.

• It stays the same.

Why is it safe to hold your breath during free diving?

• The pressure is constant.

• The pressure decreases as you ascend.

• The pressure increases as you ascend.

• The volume of air in your lungs decreases.

What is the main risk of holding your breath while ascending during a scuba dive?

• Oxygen toxicity.

• Nitrogen narcosis.

• Lung over-expansion injury.

• Decompression sickness.

What happens to the air in your lungs if you hold your breath and ascend during a scuba dive?

• It disappears.

• It expands.

• It compresses.

• It stays the same.

What should you always do while scuba diving to ensure safety?

• Keep breathing continuously.

• Ascend quickly.

• Swim against the current.

• Hold your breath.