Question

What I Can Do
Read the following situation below. Write you answer in a piece of paper.
1. An oil spill is one of the environmental problems that occur in the
bodies of water. What method of separating mixtures can be used in
order to solve this problem?
2. How can you apply the decantation method in your everyday living?​

Answer 1

(i) Mixture of sand and husk: Sand and husk can be separated by the method of winnowing.

(ii) Mixture of wheat, sugar and silk: For separating silk from the mixture we should follow the winnowing method because silk is lighter than other two components and get separated. Wheat and sugar can be separated by sieving because they are in different sizes.

(iii) Mixture of water and petrol: Water does not dissolve in petrol. So, it can be separated by the use of separating funnel.

(iv) Mixture of rice and salt: Rice and salt can be separated by sieving.

(v) Mixture of sand and salt: Sand and salt is mixed with water, salt dissolves in water and sand can be separated solution by sedimentation and decantation followed by filtration. After that using evaporation common salt is separated.

Answer 2

The method of separating mixtures that can be used to solve the oil spill problem is:-

• Skimmers are machines uniquely intended to suck up the oil from the water surface like a vacuum cleaner.
• Manual removal includes utilizing manual means like hands, rakes, scoops and so forth, to clean the surface oil and sleek garbage and spot them in exceptional compartments to be eliminated from the coastline.
• The decantation method can be applied in your everyday living in separating milk and cream. Moreover, it can be used in other cooking methods too. Kerosene and water separation is also done from this process.