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Class 9 NCERT SCIENCE Chap 1 SOLUTION

 CHAPTER 1  MATTER IN OUR SURROUNDINGS Chapter 1 MATTER IN OUR SURROUNDINGS of SCIENCE NCERT of CLASS 9 complete solution and some important points are given. This will help student to better understand the topic and can easily solve the problems related to CHAPTER 1 MATTER IN  OUR SURROUNDINGS Class 9. SOME IMPORTANT POINTS OF CHAPTER 1  MATTER IN OUR SURROUNDINGS I) Melting point :- The temperature at which solid melts to became a liquid at the atmospheric pressure is called its melting point. II) Fusion :- The process of melting that is change of solid state into liquid states is also known as fusion. III) Latent Heat Of vapourisation:- The amount of heat energy that is required to change 1kg of liquid into gas(vapour) at its boiling point is known as latent heat of vapourisation. IV) Latent heat of Fusion :- The amount of heat energy that is required to change 1kg of solid into liquid at atmospheric pressure as its melting point is known as latent heat of Fus...
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Class 8 NCERT Science Chap 13 Solution

CHAPTER 13  SOUND Here is the answer of chapter 13 SOUND of NCERT science of class 8.The complete solution of CHAPTER 13  SOUND is given here which is prepared subject expert. Some important extra questions and important points about Chapter 13 are also given. Textbook questions:- Ques1.  Choose the correct answer.  (1)  Sound can travel through a)Gases only b)Solids only c)Liquids only d)Solids, liquids and gases  Ans 1. Solids, liquids and gases.  Ques 2) Voice of when of the following is likely           to have minimum frequency?  a)Baby girl  b)Baby boy  c)A man  d)A woman  Ans.2 Baby girl Ques 3.   In the following statements, tick 'T' against those which are true and 'F' against those which are false. a)Sound cannot travel in vaccum. (T/F) b)The number of oscillations per second of a vibrating object is called its time period. (T/F) c)If the amplitude of vibration is large, sound is fee...
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CLASS 7 SCIENCE CHAPTER 12 SOLUTION

 Chapter 12  Reproduction in Plants   Here is some important points and answer  of chapter 12  REPRODUCTION IN PLANTS   NCERT science of class 7 which helps students to better understand the  topics of chapter.  Keynotes of Chap 12  1) Asexual reproduction:- In asexual reproduction plant can give rise to new plant without seeds. 2) Budding:- In  yeast  new yeast cell grown up with the help of bud like structure this process is known as budding  3. Embryo:- Developing  stage of zygote from the formation of seed is known as embryo. 4.Fertilisation :- the fusion of male and female gametes is known as fertilisation.   5. Ovule :- It is a female gametes of plant present in side of ovary. 6.Pollen grains :- Male gametes of plants present inside of anther. 7.Pollination :- The process of transfer of pollen grains from anther to stigma. 8.Seed dispersal:-  Reaching of seeds on  the tip  of  the ovary ...
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