NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms

NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms Question 1. Why do we classify organisms?Answer: For easier and convenient study we classify organisms. Question 2. Give three examples of the range of variations that you see in life-forms around you.Answer:(a) Small cat and big cow(b) Grass and banyan tree(c) Black crow and…

NCERT Solutions For Class 9 Science Chapter 6 Tissues

NCERT Solutions For Class 9 Science Chapter 6 Tissues Question 1. What is a tissue?Answer: A group of cells that are similar in structure and work together to do a peculiar function is called tissue. Question 2. What is the utility of tissues in multicellular organisms?Answer: Tissues provide structural strength, mechanical strength, show division of labour. Class…

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life Question 1. Who discovered cells, and how?Answer: Robert Hooke discovered cells in 1665 while examining a thin slice of cork through a self-designed microscope. He saw that the cork resembled the structure of a honey comb consisting of many little compartments. These small…

NCERT Solutions for Class 9 Science Chapter 4 Structure of Atom

NCERT Solutions for Class 9 Science Chapter 4 Structure of Atom Question 1. What are canal rays?Answer: Canal rays are positively charged radiations which led to the discovery of positively charged sub-atomic particle called proton. Question 2. If an atom contains one electron and one proton, will it carry any charge or not?Answer: The atom will be…

NCERT Solutions For Class 9 Science Chapter 3 Atoms and Molecules

NCERT Solutions For Class 9 Science Chapter 3 Atoms and Molecules Question 1. In a reaction 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Show that these observations are in agreement with the law of conservation…

NCERT Solutions For Class 9 Science Chapter 1 Matter in Our Surroundings

NCERT Solutions For Class 9 Science Chapter 1 Matter in Our Surroundings Question 1. Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.Answer: Chair, air, almonds, and cold-drink. Question 2. Give reasons for the following observation:The smell of hot sizzling food reaches you several meters away, but to…

NCERT Solutions for Class 9 Maths Chapter 14 Statistics

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.1 Ex 14.1 Class 9 Maths Question 1.Give five examples of data that you collect from your day-to-day life.Solution:Following are the five examples which are related to day-to-day life : Ex 14.1 Class 9 Maths Question 2.Classify the data in Q.1 above as primary or secondary…

NCERT Solutions for Class 9 Maths Chapter 12 Heron’s Formula

NCERT Solutions for Class 9 Maths Chapter 12 Heron’s Formula Ex 12.1 Ex 12.1 Class 9 Maths Question 1.A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side a. Find the area of the signal board, using Heron’s formula.If its perimeter is 180 cm, what will be the area of the signal…