Biology  by Bradford
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IB Biology B3.1 Pub Quiz: Gas exchange

B3.1 as a pub quiz for your class: review rounds on this subtopic, mixed with pure-fun rounds so it feels like a night out and not another test. Opens at SL; switch to HL in the builder to add the higher level cards.

Print teacher pagesPrint student pagesOpen in the builder to change it

Teacher pages are the quizmaster script and tally sheet. Student pages are the team answer sheet, handout and picture sheet. Both open ready to print, on A4 or US Letter.

What it covers

IB Biology at SL, with HL cards when you switch the level: B3.1 Gas exchange.

The running order

nine rounds and a handout of riddles. Review rounds are drawn from this topic each time you open the quiz, so two classes never get the same paper, and every review round can be redrawn in a click.

  1. Riddle me this review
    Course terms as riddles: "I have a head that loves water and two tails that hate it…" Teams write what it is.
  2. Close-up fun
    A tiny zoomed-in patch. What's the full picture?
  3. Fact or fiction fun
    Myths and true-but-weird facts. Teams write Fact or Fiction.
  4. Think it through review
    Scenarios, odd ones out, true or false and why, puzzles: questions to reason through. Give teams a little longer.
  5. Films in science-speak fun
    A film plot, described like a research abstract. Name the film.
  6. Who am I? Scientists fun
    Three clues, hardest first. 3 points after clue 1, 2 after clue 2, 1 after clue 3.
  7. Missing vowels: course terms review
    Your key terms with the vowels taken out.
  8. Funny animal noises fun
    YouTube clips of animals making ridiculous noises. Screen off, listen, guess, then watch the reveal.
  9. Closest wins fun
    Estimation questions. Nearest team wins the point. Doubles as the tiebreaker.

A taste of the questions

Think it through

Scenarios, odd ones out and true or false and why, from IB Biology.

  1. A flatworm has no lungs or gills and gets all its oxygen through its skin. Why could a mouse never do that?
  2. Frogs take in some of their oxygen through their skin. Why does a frog whose skin dries out get into trouble?
  3. Air holds far more oxygen than water does, yet a fish out of water suffocates. Why?
  4. What would happen to oxygen uptake in the lungs if blood stopped flowing past the alveoli?
  5. Babies born very early often struggle to breathe because their lungs make too little of one substance. What is it, and what does it do?
  6. Your lungs hold hundreds of millions of tiny alveoli rather than one big air sac. Why?
Answers
  1. It is too bulky (its SA:V is too low and the distance to its centre too great for diffusion alone)
  2. Gases must dissolve in moisture to cross an exchange surface (dry skin barely exchanges gases)
  3. Its gill filaments collapse and stick together (the surface area for gas exchange is lost)
  4. It would soon stop (the still blood fills with oxygen, so the concentration gradient disappears)
  5. Surfactant (it lowers surface tension so the alveoli don't stick shut)
  6. A huge surface area for gas exchange (about 70 m² in an adult)

Riddle me this

Course terms as riddles. Teams write what it is.

  1. I'm one of about 480 million tiny air sacs. Spread my family flat and we'd cover about 70 m². What am I?
  2. I'm a soapy film that stops your alveoli sticking shut. Babies born too early are short of me. What am I?
  3. I'm a dome of muscle under your lungs. I flatten to pull air in and relax to let it out. What am I?
  4. I'm the most air you can blow out after the deepest breath you can take. What am I?
  5. I'm the air that goes in and out with each quiet breath, about half a litre. What am I?
Answers
  1. Alveolus
  2. Surfactant
  3. Diaphragm
  4. Vital capacity
  5. Tidal volume

Quickfire

Short recall from the same topics.

  1. Air sac at the end of a bronchiole
  2. Narrow branching airway ending in alveoli
  3. Coating that stops alveoli collapsing
Answers
  1. Alveolus
  2. Bronchiole
  3. Surfactant

How it runs

  1. Open it in the builder. The running order loads ready to go. Swap, add or drop rounds, or draw a round's questions again.
  2. Present it or print it. Present puts each round on the projector in 16:9 with quizmaster notes. Print gives the script, team answer sheets, a picture sheet and a tally sheet on A4 or US Letter, with no projector needed.
  3. Score it. Teams swap sheets, mark, and each plays one joker to double a round. The scores page reveals the leaderboard from last place up.

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