Science Random Questions Flashcards
what is mass
weight
what degrees does water boil at
100°c
what degrees does ethanol freeze at?
78°c
what degrees does water start to freeze at?
4°c
what degrees does ice freeze at
0°c
what is defusion
when a gas moves from an area of high concentration to an area of low concentration eg.air freshener
what are mixtures made of
they are made of substances which are mingled together but not chemically combined eg seawater
what is crude oil a mixture of
petrol, diesel and tar
what is filtration
its used to separate a liquid and an insoluble solid. eg sand/soil and water
what does soluble mean
it will dissolve in a liquid
what does insoluble mean
it won’t dissolve in a liquid
what does residue mean
is what is left in your filter paper after filtration
what does filtrate mean
its what goes through your filter paper
what does evaporation mean
this is the changing of a liquid to a gas. this is used to separate a soluble solid and a liquid. eg salt and water
chromatography paper
separates mixtures if substances. they pass along a length of paper separating as they go up. can be used to separate inks
