Good Science Victorian Curriculum Year 7

CHAPTER 7: EARTH’S RESOURCES
Figure 7.8 Petrol for
transport is the main
use for oil worldwide.
INVESTIGATION 7.4
The sustainability
game
KEY SKILL
Representing data
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Non-renewable resources need to be
reused and recycled
Some items are designed and made to be reused again and again,
such as reusable coffee cups and glass milk bottles. Items can also be
repurposed – that is, used in a different way than they were originally
intended. For example, old car tyres may be used to make the walls of
a house.
If an item has come to the end of its useful life, the materials in it
should be recycled. Recycling is where an item is broken down into raw
materials that can be made into new products. Aluminium is a resource
that is easily and cheaply recycled – in fact, recycling aluminium
uses only 5% of the energy and produces only 5% of greenhouse gas
emissions that obtaining new aluminium from mining requires.
What is the difference between
reusing and recycling?
Figure 7.9 Some of the walls
of this house have been
made from old car
tyres filled with
compacted dirt.
CHECKPOINT 7.4
1 Identify what could happen if
a resource was not managed
sustainably.
2 Explain how overfishing can
be prevented.
3 List four other renewable
resources that need to be
managed sustainably.
4 Explain, using examples, how
the following strategies can be
used to conserve resources.
a Reducing consumption
b Reusing items
c Recycling materials
5 Explain why it is beneficial
to recycle aluminium cans.
6 Is it more important to
conserve renewable or
non-renewable resources?
Justify your response.
INQUIRY
7 Find out how your school
manages its resources, such
as water, electricity and paper.
Can you suggest ways that the
resources can be used more
sustainably?
SUCCESS CRITERIA
I can explain why it’s
important to sustainably
manage resources.
I can give examples of how
to conserve and manage
resources.
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