Good Science Victorian Curriculum Year 7

INVESTIGATIONS
METHOD
1 Copy the results table into your notebook, adding
a title and rows as needed.
2 Using a marker, number the test tubes 1–8.
3 Measure 10 mL of each of the mixtures, using a
measuring cylinder, and transfer into the appropriate
test tubes.
4 Observe the mixtures. Record a description of each
in your table.
5 After stirring, record which mixtures separate
upon standing.
6 Make the room as dark as possible, or use an underbench
cupboard. Shine a torch on each mixture
that does not separate upon standing. In your table,
describe if the mixture exhibits the Tyndall effect –
if light is scattered by the fine particles.
7 Classify each mixture as a solution, suspension
or colloid.
QUESTIONS
1 The effect of scattering particles by light is known
as the ___________ ______________.
2 a If a mixture is left to stand and then separates
out, it is a __________.
b If a mixture does not separate when left
standing and the Tyndall effect is not seen, it is
a _____________.
c If a mixture does not separate when left
standing and exhibits the Tyndall effect, it is
a _______________.
CONCLUSION
Copy and complete:
‘The results show that: (respond to the aim)’.
45 min
Level 2
155