Good Science Victorian Curriculum Year 7

CHAPTER 5: MIXTURES
FINAL CHALLENGE
1 Define the terms solute, solvent and solution.
2 Briefly summarise how water acts as a solvent in everyday life, in the
environment and in industry.
3 Explain why decanting can assist filtration to ultimately result in cleaner water.
Level 1
50xp
4 The following table lists separating techniques and different types of mixtures.
Draw a line between the separating technique and the mixture that would
allow its separation.
Filtration Iron filings mixed with sand
Decanting Salty water from which you want to extract pure water
Evaporation A mixture of fruit pulps floating in water
Distillation Oil and water
Centrifugation
A solution containing dissolved salt, from which salt
needs to be kept
Magnetic separation Muddy water containing some sand
Separating flask A solution containing sand and water
Level 2
100xp
5 Identify two ways in which water purification and waste treatment are similar,
and two ways in which they are different.
Level 3
6 Compare and contrast distillation and evaporation separating techniques.
7 A snow globe is a suspension but a drink of cordial is a solution. Explain why.
150xp
8 Select one of the separation techniques in question 4 and write a step-by-step
method for its use.
9 0The components of blood are separated using a centrifuge. Suggest what
physical properties of blood make this possible.
10 Identify four separation methods that you might use in your home. Describe
each, and comment on their similarities and differences.
Level 4
200xp
11 1 Identify an industry or occupation that would utilise the following processes:
a froth flotation
b magnetic separation
c fractional distillation.
12 Describe how separation techniques can be employed in order to clean up
after an oil spill.
Level 5
300xp
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