Question

Define the following with one example each:
a. hand picking
b. threshing
c. winnowing
d. sieving

Answer 1

Answer:

hand picking - The process used to separate slightly larger particles from a mixture by hand is called handpicking. For example: Stone pieces can be separated from wheat or rice by handpicking.

Threshing - Husk is very light whereas wheat grains are heavy. For examples; pebbles, broken grains and insects are separated from rice, wheat and pulses; by handpicking.

Winnowing - The chaff from a heap at a little distance from the heap of grains . This is process is known as winnowing. Examples are paddy (rice) and wheat .

sieving -

• at home: draining the water from a pot of noodles.
• at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.
• at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.
• at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.school: separating the chalk from the chalk dust.
• at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.school: separating the chalk from the chalk dust.By cracking a nut finely and your can separate it.

Answer 2

answer is

hand picking - The process used to separate slightly larger particles from a mixture by hand is called handpicking. For example: Stone pieces can be separated from wheat or rice by handpicking.

Threshing - Husk is very light whereas wheat grains are heavy. For examples; pebbles, broken grains and insects are separated from rice, wheat and pulses; by handpicking.

Winnowing - The chaff from a heap at a little distance from the heap of grains . This is process is known as winnowing. Examples are paddy (rice) and wheat .

sieving -

at home: draining the water from a pot of noodles.

at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.

at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.

at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.school: separating the chalk from the chalk dust.

at home: draining the water from a pot of noodles.construction site: separating fine gravel from coarse gravel.laboratory: using filter paper to separate a liquid and precipitate.school: separating the chalk from the chalk dust.By cracking a nut finely and your can separate it.