As an Amazon Associate I earn from qualifying purchases.

Free MCQsLearn App Download - Android - iOS

Download eBooks for Online Degree Programs

Class 7 Science Certification

Science Questions Answers

What is job of phloem
From where does roots take up oxygen
What is an artificial pacemaker
What happens when atria are full of blood
What is diaphragm
What is ratio of water and bacteria in faeces
What are intercoastal muscles
What are xylem and phloem
What is diarrhea
What is size of white blood cell
How many parts does flower has
What happens if excess lactic acid is produced
After digestion in stomach where does food move
Where are red blood cells made
Which muscles make our chest move
What is tobacco smoking
What is main job of white blood cells
How many chemicals are used in tobacco smoke
What is absorbed in large intestine
Why is it better to breathe through nose
How are these parts arranged
What is chlorophyll
How long does person survive after heart transplant
What is sexual reproduction
What are enzymes

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.

Learn also:

What happens if sufficient oxygen is not present?
How can indigestion cured?
What are vitamins and functions?
What are effects of Nicotine?
How does air reach blood vessels?
What if cough is vigorous?