What is filter?

Answer 1

Filtering is a mechanial or computational process to exclude something from something else. Examples of filtering include:

• coffee pot with ground coffee beans
• a tea strainer with tea leaves
• a sorting tray for mining gold
• a furnace (furnace filters)
• a filtered cigarette
• a computer program designed to filter data

Answer 2

Filter is an instrument used to separate undesirable substances from a liquid, air.

It's a term also used in electronics but with a different sense. In this case it doesn't retain substances, but it works with frequencies.

Answer 3

removing a solid (dirt, leaves. etc) from a liquid.

You pour a solid liquid mixture into the filter paper as it is as a mixture then the solid will stay up and the water will go down into the cup. So then you have the liquid on its own and the solid on its own. -written by someone else

removing impuritys or toxins from a liquid (such as water).

OK, i cannot guarantee that doing this will make all marsh, pond, or lake water 100% safe to drink, I'm no scientist. i Hope that by reading this sad excuse for a procedure, you will understand filtration and hopefully you will learn something new.

i would suggest starting by crushing some (however much you think is a reasonable amount for the amount of water you have) charcoal into pieces about the size of your average marble (so that maximum surface area is exposed without the risk of it ending up in your water. there for it may be unwise to make it into a powder).

next i suggest setting up a colonder lined on the inside with a clean, tightly woven cloth and place the colander onto the clean container into wich you wish to filter your water.

put the charcoal in the lined colender.

slowly pour your un-filered water into the lined colender.

your water should come out fairly clean.

this happens because the coal draws the toxins from the liquid, *this is the same general idea as what happens in a BRITA filter*