Add the mixture of sawdust, sand and salt to water. The sawdust will float and can be skimmed form the surface. The salt will dissolve in the water. The sand can be filtered from the mixture which remains. The salt water solution which remains can be heated and the water will evaporate leaving the salt behind.
Use a filter to separate the saw dust from salt water then boil the salt water
magnet is used to seperate iron dust and sulfur dust mixture
a cloud is a mixture of water vapor and dust(ground)
Mix with water, the pass through a filter paper. The salt will be dissolved in the water so it will be removed with the water, leaving the iron filings and gold dust on the filter paper. Leave this to dry then separate off the iron filings using a magnet, leaving behind the gold.
Add water to the mixture. The sand will sink to the bottom, the wood will float to the top and the salt will dissolve in the water.
magnet
pour water in the cup, the saw dust flouts up the sand stays at the bottom
magnet is used to seperate iron dust and sulfur dust mixture
Use a magnet.
a cloud is a mixture of water vapor and dust(ground)
Mix with water, the pass through a filter paper. The salt will be dissolved in the water so it will be removed with the water, leaving the iron filings and gold dust on the filter paper. Leave this to dry then separate off the iron filings using a magnet, leaving behind the gold.
Add water to the mixture. The sand will sink to the bottom, the wood will float to the top and the salt will dissolve in the water.
mixture, definitely. unpolluted rainwater has water, carbonic acid (from dissolved carbon dioxide in the atmosphere), dust, and maybe other things
Condensation (i.e. water droplets) and dust.
magnet
Magnetism would be the most useful physical property for separating fine saw dust and salt. However, since neither is magnetic, a process of dissolving the salt in water, filtering out the saw dust, and boiling away the water is necessary.
You could sift the mixture through a wire screen sieve which has a mesh small enough to let the sand pass through, leaving the copper on top of the screen.
First remove iron filings with a magnet. That leaves sand, salt and chalk dust. Add water which dissolves the salt, and filter leaving the sand and chalk dust on the filter paper. Put that back in water and add acid to dissolve the chalk dust (CaCO3) leaving the sand as a solid. Filter to obtain the sand. The chalk dust will now be in the acid as CO2 and H2O and the Ca salt of the acid.