Defogging Techniques for Underwater Masks and Canoeing History
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Questions and Answers

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?

<p>Snorkel (D)</p> Signup and view all the answers

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

<p>Rotate to different angles (C)</p> Signup and view all the answers

What does a snorkeling fin do?

<p>&quot;Pushes back&quot; anything moving through it (B)</p> Signup and view all the answers

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

<p>Buoyancy (D)</p> Signup and view all the answers

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

<p>Enhance cooling (B)</p> Signup and view all the answers

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

<p>Keeps standing balance in water (C)</p> Signup and view all the answers

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

<p>Works out the quadriceps, hamstrings, calves, and more (C)</p> Signup and view all the answers

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

<p>Snorkeling (D)</p> Signup and view all the answers

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

<p>Buoyancy (B)</p> Signup and view all the answers

What is the purpose of a yoke in a canoe?

<p>To allow the canoe to rest on a person's shoulder when portaging (C)</p> Signup and view all the answers

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

<p>Stern (D)</p> Signup and view all the answers

What do gunwales do in a boat?

<p>Act as structural support and define the shape of the boat (C)</p> Signup and view all the answers

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

<p>Inuit and Aleut (B)</p> Signup and view all the answers

What is the significance of the Pesse Canoe?

<p>It was found in the Netherlands and believed to be constructed between 8200 and 7600 B.C. (C)</p> Signup and view all the answers

What equipment is used to maneuver a boat?

<p>Paddles (A)</p> Signup and view all the answers

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