Class 9 | Science | Chapter 8 |Motion| NCERT Solutions Page 100 1. An object has moved through a distance. Can it have zero displacement? If yes, support your answer with an example. Answer: Displacement is the shortest distance between initial and final position of body along with direction.Yes, an object moved through a distance can have zero displacement. For Ex: … [Read more...] about Chapter 8 Motion
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Chapter 7 Diversity in Living Organisms
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
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 … [Read more...] about Chapter 6 Tissues
Chapter 5 The Fundamental Unit of Life
Class 9 | Science | Chapter 5 |The Fundamental Unit of Life| NCERT Solutions Page 59 1. Who discovered cells, and how? Answer: Cells were discovered in 1665 by an English Botanist, Robert Hooke. He used a primitive microscope to observe cells in a cork slice. 2. Why is the cell called the structural and functional unit of ? Answer: Cell is the smallest unit of … [Read more...] about Chapter 5 The Fundamental Unit of Life
Chapter 4 Structure of the Atom
Class 9 | Science | Chapter 4|Structure of the Atom | NCERT Solutions Page 47 1. What are canal rays? Answer: Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Gold stein in 1886. 2. If an atom contains one electron and one proton, will it carry any charge or … [Read more...] about Chapter 4 Structure of the Atom
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 + … [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