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WorksheetsPure Substances and Mixtures
Total questions: 16
Worksheet time: 18mins
We can classify all matter into pure substances and (a)
Distilled water is a (a) , because it has the same chemical structure whether it is isolated from a river or made in a laboratory.
The air we breathe is a (a) because it is made of several different gases.
Which of these are pure substances?
Drinking water
Distilled water
Salty water
Water steam (steam = vapor)
H2O
Which of these are mixtures?
Vinegar
Salty water
Air
Carbon dioxide (CO2)
Steel (steel = acer)
A mixture contains (a) pure substances.
We separate mixtures into ____________ and ____________ depending on whether we can distinguish their components.
(a)
Which of these are homogeneous mixtures?
In a homogeneous mixture...
... it is impossible to see the different components.
... there is no way to separate the components.
... the components always have similar chemical formulas.
... it is possible to see the different components.
In a heterogeneous mixture...
... it is impossible to see the different components.
... there is no way to separate the components.
... the components always have similar chemical formulas.
... it is possible to see the different components.
If a substance is homogeneous in appearance, then it has to be a mixture.
True
False
Mixtures can be made with...
Solids
Liquids
Gases
All of the above
What would you use to separate sand from iron filings? (iron fillings = llimadures de ferro)
(a)
A rock which looks the same all around is...
A pure substance
A homogeneous mixture
A heterogeneous mixture
We can't know just by looking at it
What do the words Homos and Heteros mean in Latin?
Homos: the same, Heteros: different
Homos: different, Heteros: the same
Homos: man, Heteros: woman
What grade do you think you got ?
Between 0 and 2
Between 2 and 4
Between 4 and 6
Between 6 and 8
Between 8 and 10
