Class 5 EVS Breathe In Breathe Out chapter questions and answers, MCQs, fill in the blanks, and short answers explained in simple language for easy learning and revision.
Tick (✔) the right answer
Q.- We breathe in …
(a) nitrogen (✔)
(b) oxygen
(c) carbon dioxide
Q.- When we run or do physical
exercise, we breathe …
(a) normally
(b) faster (✔)
(c) slower
Q.- The __________ is a muscular organ that pumps
blood throughout the body.
(a) diaphragm
(b) lung
(c) heart (✔)
Q.- The lungs are protected by the __________.
(a) ribcage (✔)
(b) diaphragm
(c) windpipe
Q.- When we breathe out air, it is called
__________.
(a) inhalation
(b) exhalation (✔)
(c) blowing
Answer the following questions
Q.- What do you mean by the term breathing?
Breathing is the process of taking in oxygen and giving out carbon dioxide.
Q.- Explain the process of exhalation.
In exhalation, the diaphragm moves up and the lungs shrink, pushing out carbon
dioxide from the body.
Q.- Differentiate between inhalation and exhalation.
Inhalation: Taking in oxygen, lungs expand.
Exhalation: Giving out carbon dioxide, lungs shrink.
Q.- Why should we breathe through the nose?
We should breathe through the nose because it filters dust and cleans the air
before it enters the lungs.
Q.- Why does our breath form a mist on the mirror?
Our breath contains water vapour which condenses on the cool mirror surface,
forming mist.
Write ‘T’ for true and ‘F’ for false statements
- The ribs move forward when we breathe in. → T
- Lungs are located in the chest. → T
- The doctor uses a stethoscope to listen to our heartbeat. → T
- Air from our nose goes into the blood. → F
- The rate of breathing of an adult is about 16 times per minute. → T
- Oxygen is needed for burning. → T
Fill in the blanks with appropriate words
- We breathe in oxygen and give out carbon dioxide.
- The diaphragm is a sheet of muscles below the lungs.
- We breathe faster when we run.
- The lungs are richly supplied with blood vessels.
- The air has oxygen which helps the wood to burn.
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