Gist of NCERT - Science - Part 1

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Animals which eat only plants are called herbivores.  
Animals which eat only animals are called carnivores. 
Animals which eat both plants as well as other animals are called omnivores.

Some diseases/disorders caused by deficiency of vitamins and minerals

Vitamins / Minerals	Deficiency disease/disorder	Symptoms
Vitamin A	Loss of vision	Poor vision, loss of vision in darkness(night), sometimes complete loss of vision.
Vitamin B1	Beriberi	Weak muscles and very little energy to work.
Vitamin C	Scurvy	Bleeding gums, wounds take longer time to heal.
Vitamin D	Rickets	Bones become soft and bent.
Calcium	Bone and tooth decay	Weak bones, tooth decay.
Iodine	Goiter	Glands in the neck appear swollen. Mental disability in children.
Iron	Anaemia	Weakness

Notes on Fibre: 

1. Fabrics are made from yarns, which in turn are made from fibres.
2. Fibres are either natural or synthetic. 
3. Cotton, wool, silk and jute are some natural fibres. 
4. Nylon and polyester are some examples of synthetic fibres.
5. Fibres like cotton and jute are obtained from plants.
6. The process of making yarn from fibres is called spinning.
7. Fabric from yarns is made by weaving and knitting.

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