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HIA International — Grade 7

Unit 1: Breathing and respiration

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Unit 2: Dissolving, solubility and chromatography

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Unit 3: Forces, motion and pressure

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Unit 4: Ecosystems

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Unit 5: Atoms, purity and climate

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Unit 6: Light and objects in space

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Unit 7: Nutrition, health and movement

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Unit 8: Energy changes and reactions of metals

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Unit 9: Magnetism and electromagnets

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Quiz

1.3 Breathing

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Breathing Checkpoint Biology quiz: free practice for Cambridge Checkpoint Biology 0893. Work through this Breathing Checkpoint Biology quiz and get instant feedback on every answer. If you get stuck, review the 4.3 Breathing lesson. More practice: Cambridge Checkpoint Biology 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 48
  • Passing grade: B+
  • Time limit:
Start Quiz
1.
When you breathe in, the diaphragm:
Contracts and flattens
Stops moving
Relaxes and domes upward
Moves into the chest
2.
The diagram shows a section through the chest with four structures labelled P, Q, R and S. Which two labelled structures contract when a person breathes in?
Dr Dabour Hub Academy - figure 1
Structures Q and S
Structures R and S
Structures P and R
Structures Q and R
3.
In this model of the chest, the rubber sheet is pulled down as the arrow shows. What happens next?
Dr Dabour Hub Academy - figure 2
The balloons deflate because the stretched rubber sheet squeezes them
Nothing happens, because the stopper seals the top of the bell jar
The balloons inflate as the pressure in the jar falls
The balloons inflate because the rubber sheet pushes air up into them
4.
Look again at the bell jar model of the chest. Which is a weakness of this model?
Dr Dabour Hub Academy - figure 3
The glass jar cannot move up and out like the ribs
The Y-shaped tube does not represent the trachea and bronchi in any way
The balloons get bigger in the model, but real lungs never change in size
Pulling the sheet down makes the jar pressure rise, unlike in a real chest
5.
The spirometer trace shows Hana breathing at rest and then on an exercise bike. Each peak is one breath. What was her breathing rate at rest?
Dr Dabour Hub Academy - figure 4
6 breaths per minute
24 breaths per minute
5 breaths per minute
12 breaths per minute
6.
Sofia filled a bottle with water, turned it upside down in a trough and breathed out once through the tube. What volume of air did she breathe out?
Dr Dabour Hub Academy - figure 5
About 2.2 litres
About 0.8 litres
About 3.0 litres
About 5.2 litres
7.
The graph shows Musa's breathing rate before, during and after exercise. How long after he stopped exercising did his breathing rate return to its resting value?
Dr Dabour Hub Academy - figure 6
About 9 minutes
About 2 minutes
About 5 minutes
About 14 minutes
8.
Four students measured round their chests after breathing in fully and after breathing out fully. Whose chest expanded the most?
Dr Dabour Hub Academy - figure 7
Ali, whose chest was the largest after breathing in
Bea, whose chest was the smallest after breathing out
Dina, whose two measurements were the closest together
Chen, by 7 cm
9.
Panels P and Q show the same chest at two moments. Which panel shows the chest at the end of breathing in, and why?
Dr Dabour Hub Academy - figure 8
P, because its diaphragm is domed upwards into the chest
Q – diaphragm flattened, ribs raised
P, because its ribs are lower down and sloping more steeply
Q, because its diaphragm has relaxed and moved downwards
10.
Which student's breathing rate increased the most after skipping?
Jack, with the highest rate after skipping
Mia, whose rate went up by 12 per minute
Leila, up 15 breaths per minute
Omar, who had the highest rate at rest
11.
Use the table to work out how much air Ayesha breathes in each minute while running the race.
70 litres per minute
37 litres per minute
17.5 litres per minute
6 litres per minute
12.
At which stage in the table is air moving into the lungs?
Stage 2, lower than outside
Stage 3, when the pressure in the lungs is at its highest
Stage 1, when the pressures inside and outside are equal
Stage 3, because the high pressure inside draws air in
13.
Which statement best describes the pattern in Dev's results?
Breathing rate rose by exactly the same amount every minute
Breathing rate fell as he did more minutes of step-ups
Rate rose, then levelled off near 32
Breathing rate stayed the same after the first minute
14.
Before measuring lung volume with an upturned bottle, why must the bottle be completely full of water?
So that the bottle is heavy enough to stay upright in the trough
So that the water can push extra air back into the person's lungs
So that the breath is cooled down and becomes easier to measure
So all air in it comes from the breath
15.
Which statement correctly separates breathing from respiration?
Breathing moves air; respiration releases energy
Breathing releases energy in cells; respiration moves air in and out
They are two names for the same process that happens in the lungs
Breathing happens in all cells; respiration happens only in the lungs
16.
Why does air move into the lungs when the volume of the chest increases?
The lungs squeeze themselves and suck the air in through the nose
The diaphragm blows air up into the trachea and down to the lungs
Pressure inside falls below the pressure outside
Pressure inside rises above the pressure outside, drawing air in
17.
Mr Diaz has a cracked rib, and it hurts to lift his ribcage. Which action will he rely on more to breathe in?
Relaxing the diaphragm so that it domes upwards
Relaxing the intercostal muscles to raise the ribs
Tightening his lungs to make them larger
Contracting and flattening the diaphragm
18.
Kai wants to find out whether the time spent skipping affects breathing rate. Which plan is best?
Skip 1, 2, 3 and 4 min, resting between, counting breaths after each
Skip once for 4 minutes and count his breaths an hour later
Skip for different times and measure his height after each one
Ask different friends to skip for different times on different days
19.
Each option pairs a structure with what it does when you breathe out. Which pairing is correct?
Intercostal muscles – contract and pull ribs up
Diaphragm – relaxes and domes upwards
Ribs – move upwards and outwards
Chest cavity – becomes larger in volume
20.
Each option pairs a change in the chest with its result. Which pairing is correct?
Chest volume decreases – pressure inside falls
Diaphragm relaxes – chest volume increases
Ribs move down and in – air rushes in
Chest volume increases – pressure inside falls
21.
Each option pairs an activity with the breathing you would expect. Which pairing is correct?
Sprinting – fast, deep breaths
Sleeping – fast, deep breaths
Sitting reading – the fastest breathing rate
Jogging – slower breathing than at rest
22.
Each option pairs a piece of equipment with what it measures in breathing investigations. Which pairing is correct?
Stopwatch – depth of each breath taken
Tape measure – oxygen in the breath
Spirometer – volume of air breathed in and out
Upturned bottle – breaths per minute
23.
Tariq fills the bottle with water, turns it upside down in a trough and breathes out once through the tube. The diagram shows the result. What does it show?
Dr Dabour Hub Academy - figure 9
He breathed out about 3.0 L, the water left in the bottle
He breathed out about 1.5 L; his air pushed that water out
He breathed out about 1.5 L; his lungs absorbed the water
He breathed out 2.5 L, the whole height of the bottle scale
24.
Ines's group measured their breathing rates at rest and after one minute of star jumps. Which result is most likely an error, and what should they do?
Ken's rate at rest; it is the lowest so it should be deleted
Omar's rate after exercise; it is higher than his rate at rest
Ines's rate at rest; it should be the same as everyone else
Lucia's rate after exercise; she should repeat the measurement
25.
Rahim is investigating how the length of time spent jogging on the spot affects breathing rate. Which variable must he keep the same?
The time spent jogging on the spot
The breathing rate after jogging
The same person jogging at the same speed
The number of breaths he counts
26.
Match the term to its correct meaning: ribs
the air that is breathed out
the bones around the chest that move upwards when you breathe in
the muscles between the ribs that move them when you breathe
the sheet of muscle below the lungs that pulls downwards when you breathe in
27.
Match the term to its correct meaning: chest cavity
the sheet of muscle below the lungs that pulls downwards when you breathe in
the amount of space something takes up, here the amount of air pushed out of the lungs
the space inside the chest whose volume changes as you breathe
what a muscle does when it gets shorter, as the intercostal muscles do when you breathe in
28.
Match the term to its correct meaning: diaphragm
what increases when the volume of a gas container is decreased
moving air into and out of the lungs
the muscles between the ribs that move them when you breathe
the sheet of muscle below the lungs that pulls downwards when you breathe in
29.
Which term is described as: what a muscle does when it gets shorter, as the intercostal muscles do when you breathe in?
relax
contract
diaphragm
expired air
30.
When the diaphragm contracts it flattens, and the volume of the chest cavity _____.
increases
decreases
stays exactly the same
falls to zero
31.
Air always moves from where the _____ is higher to where it is lower, so air leaves when the chest is squeezed.
temperature
muscle strength
pressure
rib count
32.
Using the table, Lena's mean lung volume is _____.
9.6 litres
3.3 litres
3.2 litres
0.2 litres
33.
The air you breathe out contains less oxygen than the air you breathe in. - True or false?
True
False
34.
Breathing out pushes water out of an upturned bottle in the lung volume experiment. - True or false?
True
False
35.
Gas exchange happens in the air sacs of the lungs. - True or false?
True
False
36.
The air you breathe out contains more oxygen than the air you breathe in. - True or false?
True
False
37.
Statement about Hana's spirometer trace: once she started pedalling she breathed both faster and more deeply. True or false?
Dr Dabour Hub Academy - figure 10
False – she breathed faster, but the depth of each breath stayed the same
True – the peaks are closer and taller
False – she breathed more slowly, but each of her breaths was deeper
True, but only for the first two breaths after she started pedalling
38.
Statement: every entry in Shreya's results table is correct. True or false?
True – every entry matches what happens in the bell jar model
False – pulling the sheet down should make the balloons deflate
False – pushing up raises the pressure
False – pushing the sheet up should make the volume increase
39.
Quiet exhaling at rest happens mainly because the muscle sheet under the lungs and the muscles between the ribs relax. True or false?
True – quiet breathing out is mostly relaxation
False – both sets of muscles must contract hard to push air out
False – only the lungs contract to squeeze the air back out
True, and the diaphragm moves downwards as it relaxes
40.
When the ribs move down and in, the volume of the chest cavity increases. True or false?
True – moving the ribs in makes more room for the lungs
False – the volume decreases
True – this is what happens every time you breathe in
False – the ribs never move at all during breathing
41.
The lungs have their own muscles, which make them expand when you breathe in. True or false?
True – the lung muscles contract to pull the air in
True – lungs contract to breathe in and relax to breathe out
False – the lungs never change size during breathing
False – the chest getting bigger expands them
42.
The ribcage protects the lungs and also moves during breathing. True or false?
False – the ribs protect only the heart, not the lungs
False – the ribs are muscles that pull on the lungs
True – it does both jobs
True, but the ribs stay perfectly still during breathing
43.
In the bell jar model, the balloons stand for the lungs and the Y-shaped tube for the trachea and bronchi. True or false?
True – like the trachea splitting in two
False – the balloons represent alveoli and the tube represents the ribs
False – the balloons represent the diaphragm and the tube the lungs
True, and the rubber sheet at the bottom represents the ribs
44.
A hiccup is a sudden contraction of the diaphragm, so air rushes into the lungs during a hiccup. True or false?
False – a contracting diaphragm pushes air out of the lungs
False – the diaphragm plays no part in moving air
True, but only because the ribs move down and in
True – the chest volume suddenly increases
45.
If the bell jar has a small hole in its side, pulling the rubber sheet down will not inflate the balloons as well. True or false?
False – the hole lets even more air flow into the balloons
True – air leaks in, so pressure hardly falls
False – the hole makes no difference while the Y-tube is open
True, but only because the hole damages the rubber sheet
46.
When you breathe in, the intercostal muscles contract and move the ribs up and out. True or false?
False – they relax so that the ribs can move up and out
False – they contract and pull the ribs down and in
True – this increases the chest volume
True, but it makes the chest volume smaller
47.
Breathing speeds up during exercise so that more oxygen is taken in and more carbon dioxide removed. True or false?
False – breathing speeds up only to cool the body down
False – muscles need less oxygen while exercising
True, but only because the lungs are tired
True – working muscles need this
48.
Ravi counted a friend's breaths for 10 seconds once and multiplied by 6. He says this is just as reliable as counting for a full minute three times. True or false?
True – multiplying the 10-second count by 6 always makes the answer exact
False – a short single count magnifies errors; repeats are better
True, because breathing rate never changes
False – he should have multiplied by 10 instead
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Part of Unit 1: Breathing and respiration — see every lesson and quiz in this unit.
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