NCERT solutions for Science

  NCERT solution  > Class 9th  > Science  NCERT solution for class 9th  // Science // Chapter 7-  Diversity in living organism Page number 80  Q1. Why do we classify organisms?  Answer -  We classify organisms for convenient study of variety of lives Q2. Give three examples of the range of variations that you see in life forms around you ?  Answer -  The range of variations are  Living organism are found in very small size like microscopic bacteria and in huge size like a tall trees Lifespan of different organism is also different May fly  life plan one day a while parrot lives for about 140 years   The members of one group have different colour shape and size example snake and lizard both belong to reptelia  Page number 82  Q3. Which do you think is a more basic characteristic for classifying organisms  ? a) The place where they live  b) The kind of cells they are made of why  ?...

  NCERT solution > Class 9 > Science  NCERT solution for class 9// Science // Chapter  6 -  Tissue Page number 69  Q1. What is a tissue ? Answer - T issue is a group of cell having similar structure and function  Q2. What is the utility of tissues in multicellular organisms ? Answer - Multicellular organism have definite division of labour so different types of tissues are found in the body and they perform different functions Page number 74  Q3. Name types of simple tissues ? Answer-  There are three types of the simple tissues are  Parenchyma  Collenchyma and  Sclerenchyma  Q,4. Where is apical meristem found ? Answer -  Apical meristem is found at the tip of the root or shoot of the plant Q5. Which tissue makes up the husk of coconut? Answer- The husk of the coconut is made up of sclerenchyma tissue Q6. What are the constituent of phloem ? Answer - The constituent of phloem are seive tubes, companion cells, phloe...

 NCERT solution  > Class 8  > Science   NCERT solution for class 8 // Science // Chapter 7 -Conservation of plants and animals Chapter 7 -Conservation of plants and animals Q1. Fill in the blanks a) A place where animals are protected in their natural habitat is called sanctuary  b) Species found only in a particular area is known as endemic  c) Migratory birds fly to far away places because of  climatic changes  Q2. Differentiate between the following  a) Wildlife sanctuary and biosphere reserve  b) Zoo and wildlife sanctuary  c) Endangered and Extinct species  d) Flora and Fauna  Answer -  1. Wildlife sanctuary  .Biosphere reserve  Wildlife sanctuary is a reserve forest area provide protection and suitable living conditions to wild animal  In biosphere reserve area the conservation of biodiversity like variety of plants animals and microorga...

  NCERT solutions > class 8  > Science   NCERT solution for class 8  //Science // Chapter 6 --  Combustion and flame Q1. List conditions under which combustion can take place  Answer - Combustion can takes place under following conditions   Presence of goods fuel  Presence of more oxygen in air  Ignition temperature  Q2. Fill in the blanks.   a) Burning of wood and coal causes   pollution of air pollution    b) A liquid fuel used in homes is LPG  ( Petroleum gas)    c) Fuel must be heated to its ignition temperature before it starts burning     d) Fire produced by oil cannot be controlled by  Water Q3. Explain how the use of CNG in automobiles has reduced pollution in our cities . Answer - CNG is a cleaner fuel it does not causes any harmful product but fossil fuel like a petroleum causes the incomplete carbon particles along with carbon monoxide gas and it increase...

NCERT solution   > Class 10th  >Science   NCERT solution for class 10th // Science // Chapter 16 -Sustainable management of natural resources                 Page number 271  Q1. What changes can you make in your habits to become more environment  friendly  Answer -   We should change our habits to become a more environment friendly atmosphere like  We should use paper bags instead of plastic bags Use energy sources like LPG solar energy which do not cause any pollution . Use substance which are recycled or can be reused  Q2. What would be the advantages of exploiting resources with short term AIMS?  Answer -   Exploiting natural resources in short term in have some advantages it take millions of the years for the formation for natural resources and it is not possible to renew them now Q3. How would these advantages differ from the advantages of using a long...

 NCERT solutions > Science > Class 10   NCERT solution for class 10th //Science // Chapter 15 - Our environment                 Page number 260  Q1. What are trophic levels give an example of a food chain and state the different trophic levels in it ?  Answer .- The transfer of food or energy takes place through various levels in a food chain . Which are known as trophic level ex. Plants →  Grasshopper   →    Frog    →     Snake      →     Hawk  1st Trophic level   → 2nd Trophic level → 3rd  Trophic level →4th  Trophic level  → 5thTrophic level Q2. What is the role of decomposers in the ecosystem ?  Answer - Organisms are depend on dead plants and animals for their nutrition is called decomposers Ex . Bacteria , fungi etc. They break down the complex food component into simple one and released ...