Class 9 Science NCERT Solutions Chapter 16: Floatation Question 1. Why is it difficult to hold a school bag having a strap made of a thin and strong string ? Answer: It is painful to hold a heavy bag having strap made of a strong and thin string. When we hold a heavy bag […]
 Class 9 Science NCERT Solutions Chapter 15: Improvement in Food Resources Question 1. What do we get from cereals, pulses, fruits and vegetables ? Answer: Cereals: Mostly carbohydrates Pulses: Mostly proteins Fruits: Vitamins, minerals, organic acids. Vegetables: Vitamins, minerals, small quantities of proteins, carbohydrates and oil. Question 2. How do biotic and abiotic factors adversely
Class 9 Science NCERT Solutions Chapter 14: Natural Resources Question 1. How is our atmosphere different from the atmosphere of Venus and Mars ? Answer: Atmosphere over Earth Atmosphere over Venus and Mars 1. Nitrogen and Oxygen. It contains nitrogen and oxygen. The two are absent 2. Carbon Dioxide. Carbon dioxide content is little
 Class 9 Science NCERT Solutions Chapter 13: Why Do we Fall Ill Question 1. State any two conditions essential for good health. Complete physical fitness free from any disease. Perfect mental (and social) well being. Answer: State any two conditions essential for being free of disease. Non-overcrowded living conditions, safe drinking water and clean environment.
 Class 9 Science NCERT Solutions Chapter 12: Sound Question 1. Explain how sound is produced by your school bell.                               Or Sound is produced when your
 Class 9 Science NCERT Solutions Chapter 11: Work, Power and Energy Question 1. A force of 7 N acts on an object. The displacement is say 8 m in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this
 Class 9 Science NCERT Solutions Chapter 10: Gravitation Question 1. State the universal law of gravitation. (CBSE Sample Paper, CBSE 2010, 2011, 2012, 2013, 2015) Answer: The force of attraction between two particles or objects is directly proportional to the product of the masses of the objects and inversely proportional to the square of the
 Class 9 Science NCERT Solutions Chapter 9: Force and Laws of Motion Question 1. Which of the following has more inertia ? (a) a rubber ball and a stone of the same size ? (b) a bicycle and a train ? (c) a five rupee coin and a one- rupee coin ? (CBSE 2011, 2013)
Class 9 Science NCERT Solutions Chapter 8: Motion Question 1. An object has moved through a distance. Can it have zero displacement ? If yes, support your answer with an example. (CBSE 2015) Answer: Yes, The displacement of the object can be zero. Let a boy completes one round of a circular track in 5
 Class 9 Science NCERT Solutions Chapter 7: Diversity in Living Organisms Question 1. Why do we classify organisms ? (CCE 2012) Answer: Identification is not possible without any system of classification. Classification helps in bringing out similarities and dissimilarities amongst organisms. Relationships are built up with the help of classification. They indicate the evolutionary pathways.
