EASY
7th CBSE
IMPORTANT
Earn 100

The following table compares the characteristics of inhaled and exhaled air. Place a ✓ in the appropriate column or columns.
  Inhaled air Exhaled air
Contains 21% oxygen    
Contains 4.4% carbon dioxide    
Contains moisture    
Matches the outside temperature    
Matches the body temperature    
Contains 78% nitrogen    

Important Questions on Respiration in Organisms

EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
How does oxygen in the lungs reach the other parts of the body?
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
Divers carry diving cylinders filled with gas on their backs when they go underwater. Why do mountaineers carry similar tanks with them while ascending a mountain?
EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
What are spiracles? What is their function?
EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
Why do fish seem to open and shut their mouth while in water?
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
Which part or parts of a plant take in oxygen from the air?
EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP UP>Q 4
Why do gardeners loosen the soil around the roots of plants?
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP OUT>Q 1

We sneeze when we inhale dust-filled air. What happens to the lungs when we sneeze?

MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 10 - Respiration in Organisms>STEP OUT>Q 1
Why do you see small clouds of water vapour coming out of people's mouths and noses when they are outdoors on a cold day?