3. Illustrate by a flow chart, how components of a mixture containing sawdust, iron fillings, small stones and table salt can be separated
We can't do flow charts on the board.
But you can do it easily with pen and paper.
Iron filings can be separated with a magnet, then a sieve can be used to separate the stones and sawdust. (The size hole in the sieve must be large enough to let the sawdust go through but small enough to catch all of the stones.) :-)
To illustrate the separation of components in a mixture containing sawdust, iron fillings, small stones, and table salt, we can create a flowchart with different steps for each component's separation. Here's an example of how it can be done:
Step 1: Start the process.
Step 2: Add water to the mixture and stir.
Step 3: Does the sawdust float in water? [Decision Point]
- Yes: Move to Step 4.
- No: Move to Step 5.
Step 4: Remove the floating sawdust.
Step 5: Use a magnet to extract the iron fillings.
Step 6: Is there any remaining iron fillings? [Decision Point]
- Yes: Move to Step 5.
- No: Move to Step 7.
Step 7: Pour the remaining mixture through a sieve to separate small stones.
Step 8: Does the table salt dissolve in water? [Decision Point]
- Yes: Move to Step 9.
- No: Move to Step 10.
Step 9: Filter the saltwater solution to eliminate any remaining impurities.
Step 10: Evaporate the water from the saltwater solution to obtain table salt.
Step 11: End the process.
Please note that this is a simplified example, and real-life separation techniques might vary.