explain why you need to use sieving to separate beads,sand,iron filings ,salt and water

Answer 1

Sieving is a physical method of separating different components in a mixture based on their particle size. In the case of beads, sand, iron filings, salt, and water, each component has a different particle size. Sieving is an effective method because it separates large particles from small particles and prevents them from mixing during the separation process.

For example, in the mixture of beads, sand, iron filings, salt, and water, we can use a sieve with a mesh size that can capture sand and iron filings, but allow beads and salt to pass through. When we pour the mixture through the sieve, the sand and iron filings will be retained on the sieve while the beads and salt will pass through. We can then rinse the retained mixture with water to separate the sand and iron filings from each other.

Similarly, we can use sieving to separate salt from water by using a sieve with a smaller mesh size that can capture salt crystals and let the water pass through. This method is commonly used in the salt-making industry.

Overall, sieving is a quick and efficient way to separate different components of a mixture without the need for complicated equipment or chemical reactions.