Make a labeled diagram.
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What is winnowing? Where is it used?
Q.22) Draw a diagram of a flower & label its part.
2.23) List any four adaptations of cactus plant.
2.24) Dry cell or Electric cell.
1) How many terminals to the dry cell.
2) Which is the positive terminal in a dry cell.
3) The rod inside in electric cell is made up of which metal.
4) When does the cell stop producing electricity.
25) a) Why do mountaineers carry oxygen cylinders while climbing hig
b) Name any 4 methods used for separating substances from their n
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Answers
Explanation:
Solution: Winnowing: The process of separating heavier and lighter components of a mixture by wind or by blowing air is called winnowing. This method is used by farmers to separate lighter husk particles from heavier seeds of grain.
23)These minimise the surface area and so reduce water loss. The spines also protect the cacti from animals that might eat them. Very thick, waxy cuticle to reduce water loss by evaporation . Reduced number ofstomata to reduce water loss by transpiration .
24) 4) Electric cell is a source of energy. It produces a small amount of electricity from chemicals stored inside it. ... An electric cell produces electricity from chemicals stored inside it. When the chemicals inside the cell are used up, the cell stops producing electricity.