Class 9 Science Chapter 7 Diversity in Living Organisms NCERT Solutions Page 80 1. Why do we classify organisms? Answer: There are millions of organism or species on earth. It is very difficult to study all of them one by one. The method of arranging organism into groups or sets on the basis of similarities and differences is called classification. Classification … [Read more...] about Chapter 7 Diversity in Living Organisms
NCERT Solutions
Chapter 6 Tissues
Class 9 Science Chapter 6 Tissues NCERT Solutions Page 69 1. What is a tissue? Answer: Tissue is a group of cells that are similar in structure and are organised together to perform a specific task. 2. What is the utility of tissues in multi-cellular organisms? Answer: In multicellular organisms, cells are grouped to form tissues. These tissues are specialised to … [Read more...] about Chapter 6 Tissues
Chapter 3 Atoms and Molcules
Class 9 Science Chapter 3 Atoms and Molecules NCERT Solutions Page 32, 33 1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass. sodium carbonate + acetic acid → sodium acetate + carbon … [Read more...] about Chapter 3 Atoms and Molcules
Chapter 2 Is Matter Around Us Pure
Class 9 Science Chapter 2 | Is Matter Around Us Pure NCERT Solutions Page 15 1.What is meant by a substance? Answer: A pure substance is the one that consist of a single type of particle i.e. all constituent particles of the substance have the same chemical nature. 2. List the points of differences between homogeneous and heterogeneous … [Read more...] about Chapter 2 Is Matter Around Us Pure
Chapter 1 Matter in Our Surroundings
Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Solutions Question Answers, Page 3 1. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold drinks , lemon, water, smell of perfume. Answer: Anything which occupies space and has mass is called matter. There are three states of matter: solid, liquid and gas. Chair, … [Read more...] about Chapter 1 Matter in Our Surroundings