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Option 4 : A Glass of muddy water
Sedimentation is the process of allowing particles in suspension in water to settle out of the suspension under the effect of gravity. The particles that settle out from the suspension become sediment, and in water treatment is known as sludge.
Example: In a mixture of sand and water, sand settles down at the bottom. This is sedimentation.
A Glass of muddy water is the most appropriate instructional aid for a teacher to introduce the concept of sedimentation because
- A glass of water will be taken.
- Some mud which has many particles like dust, sand, and pebbles will be put in that glass of water.
- The glass will be left for some time.
- After some time students can observe all the mud particles settle down on the bottom of the glass due to the effect of gravity.
- Thus students get introduced to a new topic called sedimentation in an effective manner.
Hence A Glass of muddy water is the most appropriate instructional aid for a teacher to introduce the concept of sedimentation.
| A filter paper | This is used to introduce the process of filtration. |
| A mixture of oil and water | This is used to introduce the topic of Emulsion. An emulsion is a temporarily stable mixture of immiscible fluids. |
| Dropping a stone in a glass of water | This doesn't explain sedimentation due to the lack of sediments that are not present in a stone. |
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