Students put six step cards in order to show how air travels into the body, from air enters the nose or mouth to air reaches the alveoli. Page 2 asks them to write the path carbon dioxide takes out of the body, then answer two questions on why breathing through the nose is better and what the tiny hairs and mucus do. The answer key gives the card order by number and by letter.
“Put the parts of the respiratory system in the order air passes through them.”
Part 1 sequences nose, trachea, bronchi, smaller tubes and alveoli, and Part 2 question 1 asks for the path out.
“Explain how the nose, tiny hairs and mucus clean the air.”
Questions 2 and 3 on page 2.
Six cards lettered A to F sit in mixed order. Students write 1 to 6 on each card to show the path from the nose or mouth to the alveoli.
Question 1 gives five lines to write the path of carbon dioxide from the blood to outside the nose or mouth. Questions 2 and 3 give four lines each for nose breathing and for the job of the tiny hairs and mucus.
The correct card order with its letters, then model answers for the three written questions.
Cut and sort
Copy a spare page and cut the six cards apart so pairs can move them around before anyone writes a number.
Guess the way out
Ask students to predict the carbon dioxide path before they write it. Many see that it is the same route in reverse, starting at the alveoli.
Nose or mouth
Use question 2 as a short talk. The card on page 1 that says air is warmed and cleaned in the nose gives students the evidence.
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