1. Which of the following is luminous body?
(a) Moon
(b) Earth
(c) Venus
(d) Sun
2.What are weeds?
3.What are the uses of cotton?
4. What is the use of decantation?
Answers
1) D. Sun
2) Weeds are unwanted plants that steal nutrients from the soil.
3) Cotton is used in medical science and to make cotton clothes.
4) Decantation is frequently used to purify a liquid by separating it from a suspension of insoluble particles.
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Answer:
1 . ( d) Sun
2. weeds are unwanted plants which grow ontheir on along with the main crop and derives nutrition from that of crop. in short weeds hinder the growth of main crop
3. cotton is used to make threads , cloths for summer , bedsheets , in first aid or medical purposes
4.. Separation of waste water. During the process of filtering and cleaning the water, a decantation process is carried out where the dirty water is separated from the clean ones. ...
Extraction of sediment from wine. ...
Separation of glycerine and biodiesel. ...
Separation of water and oil. ...
Manufacture of vinegar.