alleryStart learning →Iron filings are mixed into dry sand. Which method separates them best?
AUsing a magnet
BUsing a filter
CUsing a sieve
DUsing heat only
Answer & Solution
Correct answer: A. Using a magnet
1. Iron is magnetic while sand is not.
2. A magnet held above the mixture picks up the iron filings only.
3. The sand is left behind, so the two are separated.
4. A sieve would fail here because both parts are made of similar sized grains.
_Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Magnetic separation_
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