Estimating lung volume | Science | Quizalize & Oak National Academy

Starter quiz

Humans can’t stay underwater for too long because we need to breathe in ...
- 'air' ✓
When we breathe in, air moves into the ...
- brain
- heart
- lungs ✓
- stomach
Which part is a lung?
- A
- B
- C ✓
- D
Which scientific word means "breathe in”?
- exhale
- inhale ✓
- respiration
When we breathe in, the volume of the lungs ...
- decreases.
- increases. ✓
- stays the same.
The lungs are not a big hollow bag, they are divided into tiny air sacs called ...
- 'alveoli' ✓

What happens when we exhale?
- air moves into our lungs
- all of the air moves out of our lungs so they are totally empty
- most of the air moves out of the lungs but some stays behind ✓
Who correctly explains what is meant by the volume of a liquid or gas?
- Jun: “It means how loud the liquid or gas is.”
- Lucas: “It means the height of the liquid or gas.”
- Aisha: “It means how much 3D space the liquid or gas takes up." ✓
The maximum volume of air you can breathe out after breathing in fully is called your vital ...
- capacity ✓
- estimate
- quantity
- volume
Which units do we use when writing down a measurement of the volume of a liquid or gas?
- cm
- $cm^2$
- $cm^3$ ✓
- $cm^4$
The closer a measurement is to the true value, the more ______ it is said to be.
- 'accurate' ✓
After Sam exhaled into the tube, the water level in the bottle dropped by 17 lines. Each gap between lines represents 200 $cm^3$ . Jacob’s vital capacity is ______ $cm^3$ .
- '3400' ✓

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The vital capacity of the lungs is the maximum volume of air that can be exhaled after inhaling fully.
How to measure vital capacity using simple apparatus.
The closer a measurement is to the true value, the more accurate it is said to be.
An estimate is an approximate (rough) value of a quantity (without taking accurate measurements).
An estimate of lung volume can be calculated from a measurement of vital capacity.

Using the term 'accurate' without understanding what it means in relation to scientific measurements. Thinking that an estimate is just a guess.

The lesson explores the concepts of 'accurate' and 'estimate' using simple apparatus to estimate the vital capacity of the lungs.

Volume - The amount of three-dimensional space occupied by a substance; usually measured in cm³.
Vital capacity - The maximum volume of air that can be breathed out after breathing in fully.
Accurate - The closer a measurement is to the true value, the more accurate it is said to be.
Meniscus - The surface of a liquid, which may appear curved.
Estimate - An approximate (rough) value of a quantity (obtained without taking accurate measurements).