During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand?
Stir the mixture into hot water to dissolve the sand. Strain the mixture through a paper filter to collect the sand. Drag a magnet through the mixture to attract the iron filings. Shake the mixture to cause the iron filings to settle to the bottom.