Class 8 science chapter -1 crop production and management



Keywords:


Agricultural Practices – Activities involved in the cultivation of a crop are called agricultural practices.


Animal Husbandry – Rearing animals with proper food, shelter and care on a large scale is called animal husbandry.


Crop – Plants of the same kind cultivated at one place on a large scale are called crops.


Fertiliser – Fertilisers are chemicals that are rich in particular nutrients and added to the soil for the healthy growth of crops.


Granaries – Granaries are storehouses to store the grains and protect them from pests, rats and insects.


Harvesting – Harvesting is the cutting of the mature crop manually or by machines.


Irrigation – The supply of water to crops at appropriate intervals is called irrigation.


Manure – Manure is a natural substance obtained from the decomposition of plants and animals wastes.


Plough – Plough is a tool used to turn or till the soil in fields during preparation.


Silos – Farmers store grain in bags or metalli

c tins, this is called silos.


Comments

Post a Comment

Popular posts from this blog

Class 8 synonym english

Synonyms  Absolute – complete Adequate – sufficient Affectionate – loving Announce – declare Abandon – leave Accomplish – achieve Assemble – gather Blend – mix Coarse – rough Conceal – hide Comprehend – understand Die – perish Decide – determine Distinct – clear Dispute – quarrel Enough – sufficient Eager – keen Exceed – surpass Excuse – pardon Feeble – weak Futile – useless Frighten – terrify Hinder – obstruct Join – unite Just – fair Joy – pleasure Liberty – freedom Lonely – solitary Labour – toil Lofty – high Loyal – faithful Miraculously – wonderfully
Read more

Chapter 9 class 8 friction science book work

 Q–1 Fill in the blanks : 1. Friction opposes the motion between the surfaces in contact with each other. 2. Friction depends on the nature of surface. 3. Friction produces heat. 4. Sprinkling of powder on the carrom board reduces friction. 5. Sliding friction is lesser than the static friction. Q–2 Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below: a) Rolling, static, sliding b) Rolling, sliding, static c) Static, sliding, rolling d) Sliding, static, rolling Ans: Static, sliding, rolling Q–3 Amina runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be: Options: a) Wet marble floor, dry marble floor, newspaper and towel b) Newspaper and towel, dry marble floor, wet marble floor c) Towel, newspaper, dry marble floor, wet marble floor d) Wet marble floor, dry ...
Read more