Rabu, 26 November 2014
Selasa, 21 Oktober 2014
CONTOH SOAL PISSA
BIODIVERSITY
IS THE KEY TO MANAGING ENVIRONMENT
An
ecosystem that retains a high biodiversity (that is, a wide variety of living
things) is much more likely to adapt to human-caused environment change than is
one that has little.
Consider
the two food webs shown in the diagram. The arrows point from the organism that
gets eaten to the one that eats it. These food webs are highly simplified
compared with food webs in real ecosystems, but they still illustrate a key
difference between more diverse and less diverse ecosystems.
Food
web B represents a situation with very low biodiversity, where at some levels
the food path involves only a single type of organism. Food web A represents a
more diverse ecosystem with, as a result, many more alternative feeding
pathways.
Generally, loss of biodiversity should be regarded
seriously, not only because the organisms that have become extinct represent a
big loss for both ethical and utilitarian (useful benefit) reasons, but also
because the organisms that remain have become more vulnerable (exposed) to
extinction in the future.
Question
3: BIODIVERSITY
In lines 9 and
10 it is stated that “Food web A represents a more diverse ecosystem with, as a
result, many more alternative feeding pathways.”
Look at FOOD WEB A. Only
two animals in this food web have three direct (immediate) food sources. Which
two animals are they?
A.
A Native Cat and Parasitic Wasp
B.
B Native Cat and Butcher Bird
C.
C Parasitic Wasp and Leaf Hopper
D.
D Parasitic Wasp and Spider
E.
E Native Cat and Honeyeater
BIODIVERSITY SCORING 3
QUESTION INTENT: Process:
Demonstrating knowledge and understanding
Theme: Ecosystems
Area: Science in life and health
Full credit
Code 1:
A. Native Cat and Parasitic
Wasp
Question
4: BIODIVERSITY
Food webs A and
B are in different locations. Imagine if Leaf Hoppers died out in both
locations. Which one of these is the best prediction and explanation for the
effect this would have on the food webs?
A.
The effect would be greater in food web A because the Parasitic
Wasp has only one food source in web A.
B.
The effect would be greater in food web A because the Parasitic
Wasp has several food sources in web A.
C.
The effect would be greater in food web B because the Parasitic
Wasp has only one food source in web B.
D.
The effect would be greater in food web B because the Parasitic
Wasp has several food sources in web B.
BIODIVERSITY SCORING 4
QUESTION INTENT: Process:
Drawing/evaluating conclusions
Theme: Biodiversity
Area: Science
in life and health
Full credit
Code 1:
C. The effect would be greater in food
web B because the Parasitic Wasp has only one food source in web B.
Question
1: BUSES
A bus is driving along a
straight stretch of road. The bus driver, named Ray, has a cup of water resting
on the dashboard:
Suddenly Ray has to slam
on the brakes.
What is most likely to
happen to the water in the cup?
A.
The water will stay horizontal.
B.
The water will spill over side 1.
C.
The water will spill over side 2.
D.
The water will spill but you cannot tell if it will spill at side
1 or side 2.
BUSES SCORING 1
QUESTION INTENT: Process:
Demonstrating knowledge and understanding
Theme: Forces and movement
Area: Science in
technologies
Full credit
Code 1: C. The
water will spill over side 2.
Question
4: BUSES
Ray’s bus is,
like most buses, powered by a petrol engine. These buses contribute to
environmental pollution.
Some cities
have trolley buses: they are powered by an electric engine. The voltage needed
for such an electric engine is provided by overhead lines (like electric trains).
The electricity is supplied by a power station using fossil fuels.
Supporters for
the use of trolley buses in a city say that these buses don’t contribute to
environmental pollution.
Are these supporters
right? Explain your answer. ..............................................................
...................................................................................................................................................
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BUSES SCORING 4
QUESTION INTENT: Process:
Demonstrating knowledge and understanding
Theme: Energy
transformations
Area: Science in Earth and
environment
Full credit
Code1:
Gives an answer in which
it is stated that the power station also contributes to environmental pollution:
• No,
because the power station causes environmental pollution as well.
• Yes, but
this is only true for the city itself; the power station however causes
environmental pollution.
Code 1:
• Yes and No. The buses
don’t pollute the city which is good, but the power station does pollute and
that’s not very good.
• The buses do
contribute to the environmental pollution by using fossil fuels but they’re not
as harmful as normal buses with all their gases. [Note: This answer can be
given the benefit of the doubt.]
