NCERT solutions for Science

  NCERT solutions  >  Class 6  > Science  NCERT solution for class 6// Science // Chapter 6 - Changes around us Q1. To walk through a waterlogged area you usually shorten the length of your dress by folding it can this change be reversed ? Answer- Yes this change can be reversed Q2. You accidentally dropped your favourite toy and broke it this is a change you did not want can this change be reversed ? Answer -  No this cannot be reversed change because it is permanent change Q3. Some changes are listed in the following table for each change write the blank column where the change can be reversed or not  Change                                      Can be reversed yes /no    The sawing of a piece of wood   The melting of ice candy ...

  NCERT solution >  Class 10 >  Science   NCERT solution for class 10th //  Science  // Chapter 7  -  Control and coordination                     Page number - 119 Q1. What is the difference between a reflex action and walking ?  Answer-    The difference between a reflex action and walking are as follows . Reflex action . It is an spontaneous and involuntary response to a stimulus . It is regulated by spinal cord . Its intensity cannot be changed   It Increases the survival and protective values of an organism  Walking  It is acquired through learning and it is a voluntary response  It is  coordinated by the brain  Its intensity can be changed  It is connected with the  locomotion Q2. What happens at the synapse between two Neurons?  Answer- S ynapse is a connection between the  two neurons it is a small ga...

 NCERT solution > Class 10 > Science  NCERT solution for class 10//   Science // Chapter 6 -   Life processes Page number 95  Q1. Why is diffusion insufficient to meet the oxygen requirement of multicellular organism like humans  Answer- In multicellular organisms the body is made up of many cells and all the cells are not come indirectly contact with outer atmosphere so to fulfill their  oxygen requirement the diffusion is insufficient . Q2. What criteria do we use to decide whether something is alive?  Answer-  To decide whether something is alive we use observation of micro molecular movement Q3. What are outside raw materials used for by an organism ? Answer- The outside raw material used by organisms is carbon based and organism used it for their food Q4. What processes would you consider essential for maintaining life ? Answer- The processes like nutrition and respiration transportation excretion all these are essential...

  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...