Class-7th science.

  Defination:- 1. Shearing "The fleece of sheep along  with a thin layer of skin is removed from its body.  This process is called shearing". 2. Scouring "The sheared skin with hair is thoroughly washed  in tanks  to remove  grease, dust and dirt .This is called scouring. " 3. Fibers  "The thin strands  of thread that we see are made  up of still thinner strands called fibres ". 4. Natural fibers  "The fibers of some fabrics such as cotton , jute, silk, wool are called Natural fibers. " 5. Synthetic  fiber "Some fibre are also made from chemicals substances, which are not obtain  f from plants or animal sources.  These are  called synthetic fibers. "Eg-  polyster, nylon, acrylic . 6. Yarn "Gently start pulling out the cotton while continuously  twisting the fibers   we can able to make a ' yarn'. 7. Spinning  The process  of making  yarn from fibre is called "spinning ". 8. Weaving T...

2. Nutri tion   in animals.  Defination : 1. Digestion = The break down of complex components in to simpler substances is called Digestion.  2. Egestion  = The facel matter is removed through the anus from time to time .This is called Egation . 3. Assimilation = The observe substances are transported via the blood vessels to different  organs of the body where they are used to build  complex substances such as the  proteins required by the body. This is called Assimilation.  4. Villi = The inner walls of small intestine  have thousands of tinger like outgrowth..These are called Villi. 5. Bile juice = Thelive is a radish brown and largest gland in the body it secret very essential juice for digestion. This called Bile juice. 6. Gall bladder = Bile juice is store in sac is called gall bladder. 7. Amoeba = Amoeba is a microscopic singal - called organism  found in pond water. 8. Pancreas = Pancreas is a large cream coloured  ...

Defination:- 1. Nutrition = Nutrition is the process of taking food by an organism and its utilisation by the body  . 2. Nutrients = Carbohydrates, protein, fat, vitamin ,  and minerals are the components of food.These components of food are called 'nutrients ' and these are naccessary for our body. 3. Autotrophs = Autotrophic nutrition is the made of nutrition in which organism make their own food from simple substances by the process of synthesis . These organisms are known as autotrophics plants is  called Autotrophs. 4. Heterotrophs = These organisms which can not prepare their own food and take food from green plants or animals are known as Heterotrophs. 5. Chlorophyll  = The leaves have  green pig ments ; these green pigments are called chlorophyll.  6. Stomata = The tiny poes  present on the surface of leaves.These pores are surrounded by 'guard cells' such pore are called stomata. 7. Photosynthesis = Green leaves capture the the energy of ...