Revision Paper on BLOW HOT BLOW COLD

When we run or do physical exercise, we breathe __________________.

• Normally

• faster

• slower

I’m present in the nose and trap the dust and germs in the air.

• Hair

• Bones

• Both I And II

• None of these

We should not breathe through our

• Nose

• Mouth

• Both I And II

• None of these

Identify the instrument which is not played by blowing air through it.

• Dholak

• Whistle

• Flute

• Mouth organ

Lungs are protected by ________________________.

• Ribcage

• vertebral column

• skull

• None of these

Two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below Assertion: We blow out air from our mouth when we drink hot milk or tea. Reason: As the hot milk is warmer than the air we breathe out, makes the hot milk cool faster.

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is NOT the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Assertion: We can breathe in air through our mouth. Reason: It prevents germs from entering our lungs.

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is NOT the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer the following questions: a) Mita stood in front of a mirror and saw her image. She noticed that her image got blurred. Explain the reason.

b) Write the difference between breathing in and breathing out based on the movements of the following: While breathing in While breathing out Ribcage :- Ribcage :- Diaphragm:- Diaphragm:- Chest :- Chest :- Lungs:- Lungs:-