separation of substances

What is Winnowing ?

• A method used to separate the components of a mixture which are different sizes.substances.

• The practice of separating undesirable solid substances and impurities from useful solids by hand.

• A method used to separate lighter components of a mixture from the heavier ones by wind or by blowing air.

what means to cut the crop from the field?

• Threshing

• Winnowing

• Harvesting

• Sieving

During _________________ the solid particles that settle down forming a layer are called sediments

• Decantation

• Condensation

• Evaporation

• sieving

• Sedimentation

the process of converting a liquid form to its vapour form is

• Decantation

• Condensation

• Sedimentation

• Evaporation

Which process uses a paper to catch the solids?

• Sedementation

• Decantation

• Filtration

• Evaporation

How do we separate grains from stalks?

• Sieving

• Threshing

• Winnowing

• Handpicking

How do you separate sand from water ?

• Decantation

• Sedimentation

• Filtration

• Evaporation

how do you separate husks from chaff?

• threshing

• sieving

• handpicking

• winnowing

when do we mostly use handpicking?

• When we separate stones from rice

• When we separate water from sand

• when we separate sugar from water

• ALL of the above

What is a mixture?

• A chemical combination of two or more different substances.

• A physical combination of two or more different substances.

• A chemically pure substance.

• A special type of solution