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Chapter 12 Sound

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal

Compression and rarefaction

Class 9 | Science | Chapter 12 |Sound| NCERT Solutions Page 162 1. How does the sound produced by a vibrating object in a medium reach your ear? Answer: When an object vibrates it forces the neighbouring particles of the medium to vibrate.These vibrating particles then forces the particles adjacent to them to vibrate.In this way, vibrations produced by an vibrating … [Read more...] about Chapter 12 Sound

Chapter 11 Work and Energy

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

Fig 11.3 Chapter 11 Science

Class 9 | Science | Chapter 11 |Work and Energy| NCERT Solutions Question Answers, Page 148 1. A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case? Answer: Work done = Force × Displacement W= F × … [Read more...] about Chapter 11 Work and Energy

Chapter 5 The Fundamental Unit of Life

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment

chapter 5 class 9

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 9 Reproduction in Animals

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

Metamorphosis of frog

Class 8 | Science | Ch 9 |Reproduction in Animals| NCERT Solutions 1. Explain the importance of reproduction in organisms. The production of new organism from the existing organism of the same species is known as reproduction.Reproduction is the creation of new living things.It is essential for the survival of species on this earth. So,  living organism produce more … [Read more...] about Chapter 9 Reproduction in Animals

Chapter 8 Cell Structure and Functions

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 2 Comments

Human nerve cell

Class 8 | Science | Ch 8 | Cell Structure and Functions | NCERT Solutions 1. Indicate whether the following statements are True (T) or False (F). (a) Unicellular organisms have one-celled body. (T/F) (b) Muscle cells are branched. (T/F) (c) The basic living unit of an organism is an organ. (T/F) (d) Amoeba has irregular shape. (T/F) Answer: (a) Unicellular organisms … [Read more...] about Chapter 8 Cell Structure and Functions

Chapter 7 Conservation of Plants and Animals

Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment

class-8-science-materials-metals-and-non-metals

Class 8 | Science | Ch 7 |Conservation of Plants and Animals| NCERT Solutions 1. Fill in the blanks. (a) A place where animals are protected in their natural habitat is called ______. (b) Species found only in a particular area is known as _______ . (c) Migratory birds fly to far away places because of _______ changes. Answer: (a) A place where animals are protected … [Read more...] about Chapter 7 Conservation of Plants and Animals

Chapter 1 Crop Production and Management

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

sugarcane crop production

Class 8 | Science | Ch 1 | Crop Production and Management | NCERT Solutions   1. Select the correct word from the following list and fill in the blanks. float, water, crop, nutrients, preparation (a) The same kind of plants grown and cultivated on a large scale at a place is called _________. (b) The first step before growing crops is _____________ of the … [Read more...] about Chapter 1 Crop Production and Management

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