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WorksheetsSeparation of Substances
Total questions: 10
Worksheet time: 5mins
1. 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.
2. What means to cut the crop from the field?
Threshing
Winnowing
Harvesting
Sieving
3.How do we separate grains from stalks?
Sieving
Threshing
Winnowing
Handpicking
4.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
5.A solution in which no more solute can be added is called
True Solution
Unsaturated solution
Saturated solution
Mixture
6. The density of water is 1g/cc. Mercury is denser and kerosene is less dense than water. None of the liquids mix with each other. What will a jar that has 20 ml of water, 10 ml of mercury and 30 ml of kerosene look like?
A
B
C
D
7. State whether true /false.
Oil layers in the oceans blocks the air from entering the water and affects aquatic life.
True
False
8. State whether true /false.
Immiscible liquids form different layers due to the difference in density of the liquids.
True
False
State true or false
9.The solubility of gases in water increases with increase in temperature.
True
False
10. A student measures 5 grams of sugar into 50 milliliters of water in a flask.
Which of the following should the student do to help the sugar dissolve more quickly into the water?
place the flask in a refrigerator.
place a stopper in the top of the flask
add more water to the mixture
gently swirl the mixture in the flask
