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Class 7 Science Certification

Science Questions Answers

How thrombosis can damage our heart
Where is faeces stored
Which enzyme acts on food in stomach
What is absorbed in large intestine
Why is reproduction important
How are atria and ventricles separated
What happens after white blood cell eats bacteria
How many types of pollination are there
Which blood vessel carries blood and where
Where are dead red blood cells broken
Why are plant roots important
What is affect of light on rate of transpiration
What is meant by leaking of heart valves
What are xylem and phloem
What plants do if water intake is less
What is flower
At which side of chest is heart located
What is situation of blood when it leaves heart
What happens after exchange of substances
How is hemophilia caused
Why are circulatory disease harmful
Why does constipation occur
How does red blood cells pass through capillaries
What is main job of white blood cells
What is transpiration stream

Science Quiz Questions and Answers

Topic: Food Energy and Respiration Subtopic: Making the air moist, warm and clean

Why is it better to breathe through nose?

Worksheets

Answer: Our nose contains hair that can trap dust particles and germs that are harmful for our health. When we breathe through mouth, there are no hair present within the oral cavity, so there are more chances of germs and dust particles entering the lungs.

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