Answer the following questions :-
1. How can we separate the diseased seeds from healthy one's ?
2. What are crumps ?
3. How is winnowing done ?
Answers
Answer:
1.) *Take a beaker or mug filled with water in it.
*Put all the seed on the cup of water .
*Let all the seed to settle down .
*The seed which settles down are the healthy seeds .
2.) A loud thudding sound ,especially one made by an exploding bomb or shell .
3.) Winnowing usually follows threshing in grain preparation. In its simplest form ,it involves throwing the mixture into the air so that the wind blows away the lighter chaff , while the heavier grains fall back down for recovery.
1) How can we separate diseased seeds from the healthy ones?
We can separate diseased seeds from healthy ones by submerging all of them in a beaker of water. The diseased seeds will float on top of the water while the healthy seeds will settle at the bottom of the beaker.
The reason is that diseased seeds are hollow and hence float on water while healthy seeds being heavy will settle at the bottom of the beaker.
2) What are crumbs?
Crumbs are large pieces of soil present as lumps. They need to be broken down with the help of wooden planks for the proper sowing and growth of crops. Breaking down of crumbs in a part of soil preparation.
3) How is winnowing done?
Winnowing is done with the residue of threshing - that is the grains and their husk along with some parts of the stalks. All these components are collected in a pan and are made to fall from a certain height while the wind is blowing. The husk and other particles being lighter flows away with wind and gets collected some distance away while the grains fall down directly below. Hence winnowing helps us to separate the grains from the husk.