Download Osmosis Experiments

Osmosis Experiments
Name_____________________
1
Class_______________
Date________
Complete the following sentences by choosing the correct words from the box.
Osmosis is the movement of ___________ molecules from a ___________ solution
to a more _______________ solution through a _____________ _____________
membrane.
concentrated
dilute
partially permeable
salt
2
impermeable
sugar
water
The following experiment was set up to investigate osmosis.
Complete the following statements by choosing the correct word from the brackets:
The level of the solution in the capillary tube would __________( rise / fall )during
the experiment.
I think this would happen because water would move __________( out of / into )
the tubing because it contains a more ______________( dilute / concentrated )
solution than the surrounding liquid.
© Pearson Education Limited 2001
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Longman Foundation Science for GCSE
3
The diagram below shows an experiment that was set up using equal sized pieces
of potato. All three were left for a few hours.
a)
In which beaker would the potato increase in size?
_______
b)
In which beaker would the potato decrease in size?
_______
c)
In which beaker would the potato stay the same size?
_______
d)
Which part of a potato cell is partially permeable?
e)
What happened to the cells of potato C when it was boiled?
_____________________________________________________________
__________________
_____________________________________________________________
4
5
6
In the following questions tick the correct answer and try to explain
why you chose I
t.
i)
If an animal cell is put into water it will
swell up and burst
stay the same
shrink and wrinkle
I think this because _________________________________________________
__________________________________________________________________
ii)
If a plant cell is put into water it will
swell up and burst become turgid or firm
flaccid
© Pearson Education Limited 2001
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stay the same
Longman Foundation Science for GCSE
become
I think this because _________________________________________________
__________________________________________________________________
iii)
If an animal cell is put into a concentrated salt solution it will
swell up and burst
stay the same
shrink and wrinkle
I think this because _________________________________________________
__________________________________________________________________

iv)
If a plant cell is put into a concentrated salt solution it will
swell up and burst become turgid or firm
stay the same 
flaccid
become
I think this because _________________________________________________
__________________________________________________________________
5
Ramesh had been learning about osmosis in science.
He knew that water moved from a dilute solution to a more concentrated solution.
When he was sat in the bath that night he wondered why he didn’t take in water and
swell up.
Can you explain why he stayed the same size? [Hint: Look at your definition of
osmosis in question 1.]
__________________________________________________________________
__________________________________________________________________
© Pearson Education Limited 2001
Page 3 of 3
Longman Foundation Science for GCSE