Mixtures, pure and impure substances
Authored by Aidan Leach
Science
6th - 8th Grade
Used 15+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Substances which are made of different compounds and elements which are not bonded together are called...
molecules.
mixtures.
compounds.
atoms.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sea water is a mixture because...
sand, water, salt and other substances are not bonded together.
sand, water, salt and other substances are bonded together.
sand, water, salt and other substances are difficult to seperate.
it has a fixed boiling point.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Properties of mixtures do NOT include...
being made of different amounts of each substance.
being difficult to seperate.
varied boiling and melting points.
fixed boiling and melting points.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sea water is an impure substance because...
the amounts of salt, water and sand are always fixed.
it is difficult to seperate.
it has varied boiling and melting points.
fixed boiling and melting points.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
We could seperate the substances in sea water by...
filtration then evapouration.
filtration only.
evaporation only.
being lucky.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
We could determine whether a substance was pure or impure water by...
evaporating it only.
checking the boiling point only.
checking the melting point only.
all of these things.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The most efficient way to determine whether a substance is pure or impure water is to...
evaporate all of it.
check the boiling point.
filter it.
distill it.
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