Measuring mass and volume and hence density OP2
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Take a paper cup.
Find its mass.
Mass of cup =
Find its volume
Volume of cup =
Fill the cup with a number of substances and find the mass each time.
Find the mass of each of the substances.
Substance
Mass of cup and
substance (a)
Mass of cup (b)
Mass of
substance
(a-b)
Volume of
substance
cm3
Water
Meths
Cooking oil
Sugar
Sand
All substances have the same volume but different masses.
The sand has the biggest mass.
Will sand always have a greater mass than water?
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Explain your answer.
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If you filled a bucket with water and filled a paper cup with sand, which would have
the bigger mass?
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Check your answer.
From this we see that the mass of a substance depends on its _____________.
From your table, can you work out what the mass the mass of 500 cm3 of sand would
be?
_____ cm3 of sand = _____ g
1 cm3 of sand
= _____ g
500 cm3 of sand
= ______g
Once we know the mass of 1 cm3 of a substance, we can find the mass of any number
of cm3.
Scientists have given the mass of 1 cm3 of a substance a name. They call it the
DENSITY.
Now go back to your table now and find the mass of 1 cm3 of each of the substances.
What do you call the mass of 1 cm3 of a substance?
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Draw the table obtained for the masses and volume of the various substances again.
Substance
Water
Meths
Cooking oil
Sugar
Sand
Mass (g)
Volume (cm3)
Mass of 1 cm3
Density
What two things must you know if you want to find the density (the mass of 1cm3) of
a substance?
___________________ and ________________________.
You are give a stone and asked to find its density (the mass of 1cm3).
Write out your plan
Find the ___________ of the stone using a _________________.
Find the ___________ of the stone using a _________________
Now find the density (the mass of 1cm3) by
________________________________________________________________.
To get the density you must divide the __________ by the_______________