Defogging Techniques for Underwater Masks and Canoeing History

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What is the purpose of the mask skirt?

To remove water from the mask

To hold the mask to the face

To seal the mask around the face (correct)

To provide a cushion for the nose

Which type of snorkel has a purge valve to remove water?

Classic snorkel (correct)

Dry valve snorkel

Snorkel with flexible tubes

Snorkel with splash guard

What is the function of a snorkel's dry valve?

To hold the mouthpiece in place

To prevent splashed water from entering

To stop water from entering when submerged (correct)

To rotate to different angles

Which equipment helps in breathing at the surface while submerged?

Snorkel Signup and view all the answers

What does the flexible tube on a snorkel allow it to do?

Rotate to different angles Signup and view all the answers

What does a snorkeling fin do?

"Pushes back" anything moving through it Signup and view all the answers

What is the reason why boats and people float on water?

Buoyancy Signup and view all the answers

Which characteristic of water helps in transferring heat away from the body much more quickly than air?

Enhance cooling Signup and view all the answers

What is the main benefit of hydrostatic pressure combined with buoyancy in water?

Keeps standing balance in water Signup and view all the answers

Why is snorkeling beneficial for overall fitness according to the text?

Works out the quadriceps, hamstrings, calves, and more Signup and view all the answers

Which activity allows a person to observe underwater attractions for a longer period without constantly resurfacing for air?

Snorkeling Signup and view all the answers

What provides a weightless feeling and makes it easier to move, lift knees, or jog in water?

Buoyancy Signup and view all the answers

What is the purpose of a yoke in a canoe?

To allow the canoe to rest on a person's shoulder when portaging Signup and view all the answers

Which part of a canoe is known as the 'rear end'?

Stern Signup and view all the answers

What do gunwales do in a boat?

Act as structural support and define the shape of the boat Signup and view all the answers

Which tribe originated the word 'kayak' meaning 'man's boat' or 'hunter's boat'?

Inuit and Aleut Signup and view all the answers

What is the significance of the Pesse Canoe?

It was found in the Netherlands and believed to be constructed between 8200 and 7600 B.C. Signup and view all the answers

What equipment is used to maneuver a boat?

Paddles Signup and view all the answers