Year 11 Revision November/December 2016
- Below are some questions you may want to look at with some worked answers.
- Past papers can be found here. Note there is unit 1, 2 and 3 papers here. In the mocks you will be doing a unit 3 and a unit 1 paper.
- Have a go at some of the questions from the link above. Bring them in to class so your teacher can have a look at them. ASK QUESTIONS!
- Useful Videos from Edexcel. YOU DO NOT NEED THE COASTS CLIP THOUGH
- You will also find fact tests on the school website
Qu. Explain how subduction zones
generate both earthquakes and volcanoes. [6]
•
At a subduction zone
a dense ocean plate is pushed down into the mantle.
•
Friction between the subducting plate and the plate above causes the
plate to ‘stick’.
•
Pressure builds up.
•
Eventually the pressure is too much and the plate ‘snaps’ apart.
•
The energy releases causes an earthquake.
•
As the plate sinks it is heated.
•
Some material melts and rises as magma, eventually erupting as a
volcano.
Qu. Describe the differences between
composite and shield volcanoes. [4]
•Shield
volcanoes are very high compared to composite volcanoes, but composite
volcanoes have steeper sides.
•Shield
volcanoes consist of layers of lava, but composite volcanoes have layers of ash
and lava.
•Shield
volcanoes are made of basalt, but composite volcanoes are made of andesite.
Shield
volcanoes erupt continuously but composite volcanoes erupt infrequently.
Qu. Explain why the UK is said to have a
‘temperate maritime’ climate. [4]
•Temperate
means mild, with small seasonal variations in temperature e.g. winters are
usually just above freezing and summers warm but not hot at about 17°C.
•Maritime
refers to the fairly high levels of precipitation, which occur in all months of
the year.
•The
latitude of the UK explains the mild temperatures and the fact that the UK is
surrounded by ocean brings rainfall and mild winters.
Qu. Explain how human activity is leading to climate change
•Greenhouse
gases such as carbon dioxide (1) are given out when fossil fuels (e.g. coal)
are burned in power stations and/or factories (1).
•Increasing
numbers of cars/aircraft produce greenhouse gases (1). These gases intercept
outgoing radiation and this increases atmospheric temperature (1)
Qu. Explain how climate controls the
distribution of biomes such as tropical rainforests. (4)
•Higher
temperatures generally leads to more plant growth and a greater diversity(1)
for example in the cold Tundra there is very limited growth (1), only grasses
and other ground plants exist here. However rainfall is also an important
factor more rain leads to more plant growth (1). There is far more plant growth
in the hot and wet tropical rainforest compared to the hot and dry desert (1)
Qu. Explain the role of human activity in the destruction of tropical
rainforest. (6)
Brazilian Amazon Rainforest
•Over
exploitation of forest through logging. Some of this is illegal and difficult
to stop. There are many poor people in rural Brazil who know that high prices
can be gained from tropical woods.
•Many
projects have been authorised by the Brazilian government to mine for resources
in the Amazon. This often involves the building of dams to provide HEP. This
has drowned vast areas of the rainforest.
•Huge
areas of land have been deforested for farming. A lot of this is ranching.
Brazil is a country with a growing population which is also becoming richer.
This means there is higher demand for food so large scale farming has become
more common in the rainforest
Qu. Using examples, describe how human activity can reduce water
supplies.(4)
Reduction of supply by removing too much
water from
river systems (1).,
e.g.
Colorado River
the many dams mean that only 2% of the original flow now reaches the mouth in
Mexico(1).
Climate change caused by people, reducing
rainfall
or changing
rainfall patterns (1). For
example in the Sahel region of Africa there has been an increase in droughts.(1).
Qu. For a named flood management system, examine the costs and benefits of
using traditional
flood
management techniques. (8)
•Should
be answered using a case study or case studies.
•channelisation of river?
•building
of levees?
•flood
walls?
•dams
and
reservoirs
Costs and benefits should be expressed in terms
of:
•high
cost
of such methods
•benefits
clearly
to property owners and local businesses
•costs
borne
more widely through tax system
•historical
‘success’:
has it worked?
E.g. Mississippi still floods also Ouse in York still floods
Qu. Using named examples, explain how humans can have both positive and
negative impacts
on marine eco-systems. (8)
Positive
There is a wide range of possible
positive impacts, including:
•conservation
strategies
that might involve zoning
(Soufriere, St. Lucia)
•bans
on fishing
in particularly sensitive
areas
(Lamlash Bay,
Firth of Clyde)
•global
actions
such
as CITES
Negative
Impacts could focus on:
•overfishing
and
damage to food chains
(North Sea)
•tourism,
such as taking coral as a souvenir
•pollution
from
developments such as hotels on the shore, (Soufireire)
•global
issues
of climate
change
which affect oceantemperature,
level and chemistry.
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