NCERT solutions for Science

  NCERT solution > class 7 > Science  NCERT solution for class 7|| Science || Chapter 13 Motion and Time Chapter 13 Motion and Time  Q1. Classify the following as motion along a straight line circular or oscillatory motion . i) Motion of your hands while running  ii)Motion of a horse pulling a cart on a straight road .  iii) Motion of a child in a merry go round . iv) Motion of a child on a see - saw  v) Motion of the hammer on an electric bell . vi ) Motion of a train on a straight bridge   Answer -  i) Oscillatory motion . ii) straight line motion   iii) circular motion   iv) oscillatory motion  v)  oscillatory motion  vi ) straight line motion . Q2. Which of the following are not correct . i) The basic unit of time is second  ii) Every object moves with a constant speed  iii) Distance between two cities are measured in kilometres .  iv) The time period of a given pendulum is constant...

NCERT Solution solution >  class 8 > Science  Chapter 17 -Stars and the solar system  Q1. Choose the correct answer in question 1-3  1. Which of the following is not a member of the solar system ?  a) an asteroid    b) a satellite    c) a constellation  d) a comet  2. Which of the following is not a planet of the Sun ?  a) sirius     b) Mercury     c) Saturn      d) Earth  3. Phases of the moon occur because  a) we can see only that part of the moon which reflect light towards us  b) Our distance from the moon keeps changing   c) The shadow of the earth covers only a part of the moon surface  . d) The thickness of the moon's atmosphere is not constant  Q4. Fill in the blanks  a) The planet which is farthest from the sun is Neptune.  b) The planet which appears reddish in colour is Mars  c) A group of stars that appears to...

 NCERT solution > Class 7 >Science  NCERT solution for class 7 || Science  ||Chapter 12 Reproduction in plants Chapter 12- Reproduction in plants  Exercise  Q1. Fill in the blank s  a) Production of new individual from the vegetative part of parent is called vegetative reproduction  b) Flower may have either male or female reproductive parts such a flower is called unisexual flower  c) The transfer of pollen grains from anther to the stigma of the same flower for another flower of the same kind is known as self pollination .   d) The fusion of male and female gametes is termed as fertilization  e) Seed dispersal takes place by means of wind , water and animals . Q2. Describe the different methods of asexual reproduction give examples .?  Answer -  Methods of a sexual reproduction are  Vegetative propagation   In this method the plant body is reproduced with the help of stem leaves root and Bud like vege...

  NCERT solution > Class 9 >Science  NCERT solution for class 9|| Science || Chapter 15- Improvement in food resources Chapter 15 -Improvement in food resources  Page number 204  Q1. What do we get from cereals pulses fruits and vegetables?  Answer -  We get carbohydrate from serious it gives us energy We get protein from pulses and it build our body  We get vitamins and minerals from vegetables and it provide protection to our body from the seas  Page number 205  Q2. How do biotic and abiotic factors affect crop production?  Answer- Biotic factors like rodent pest and insect loss the grains during storage and production  Abiotic factors like temperature humidity moisture it creates, germination ability, discoloration ,weight loss ,degradation in quality etc. Q3. What are the desirable agronomic characteristics for crop improvement  Answer- The desirable agronomic characteristics are The tallness of the plant increasing b...

 NCERT solution > Class 7 > Science  NCERT solution for class 7 ||Science || Chapter 11 -Transportation in animals and plants Chapter 11 -Transportation in animals and plants  Exercise  Q1. Match structure given in column I with function given in column I I                 Column I.                                   Column I I                 a) Stomata               Transport of water                  b) xylem                  Transpiration                 c)  Root hairs         Transport of food             ...

  NCERT solutions  >Class 8 > Science  NCERT solution for class 8 ||Science || Chapter 16 - Light Chapter 16- Light  Exercise  Q1. Suppose you are in a dark room can you see objects in the room can you see objects outside the room explain?  Answer - If we are in a dark room then it is not possible to see the object in the room while the object outside the room are visible to us because the object becomes visible only in presence of light . The light reaches to our eyes after being reflected from the object and the object becomes visible to us Q2. Differentiate between regular and diffuse reflection does diffuse reflection mean the failure of the laws of reflection ?  Answer - Regular reflection  It is takes place from a smooth or regular surface  In this reflection all reflected rays are parallel to each other   Diffuse reflection  Diffuse reflection takes place from an irregular surface . The reflected rays  are not...

 NCERT solutions>  Class 6 > Science  NCERT solution for class 6 || science || chapter 14 -  Water Chapter 14 -Water   Exercise  Q1. Fill up  the blanks in the following  a) The process of changing of water into its vapour is called evaporation b) The process of changing water vapour into water is called condensation  c) No rainfall for a year or more may lead to drought in that region . d) Excessive rain may cause floods . Q2. State for each of the following whether it is  due to evaporation or condensation  . a) Water drops appear on the outer surface of  a glass containing cold water. b) Steam rising from wet clothes while they are iron  c) Fog appearing on a cold winter morning  d) Blackboard dries up after wiping it  e) Steam rising from ala hot girdle when water is sprinkled on it . Answer -  a) Condensation  b) Evaporation  c) Condensation  d) Evaporation  e) Evaporati...