B3- Life on Earth
Name:-
Target grade:-
CAG:-
Question overview
Question / Topic / Mark / % / Grade / DateB3 (a) / Living organisms / 4
B3 (b) / Competition
B3 (c ) / Energy transfer / 7
B3 (d) / Nitrogen cycle / 6
B3 ( e) / Carbon Cycle / 9
B3 (f) / Environmental change / 6
B3 (g) / Variation / 31
B3 (h) / Natural selection and evolution / 6
B3 (i) / Classification
B3 (k) / Sustainability
B3 (l) / Biodiversity / 6
Colour code each subtopic using pencils, on target = orange, above = green, below = red.
B3 (a) January 2013
B3 ( C) Energy transfer (Jan 2012 )
B3 (d ) Nitrogen Cycle (Jan 2012)
Nitrogen is recycled through the environment.
Explain how the process takes place.
A space has been left for you to draw a diagram as part of your explanation.
The quality of written communication will be assessed in your answer.
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[Total: 6]
B3 (e) Carbon cycle (June 2012)
(ii) The data shown in the graph are collected from a recording station on top of a very high
mountain in Hawaii.
Some scientists have criticised this data.
They say it does not represent real and widespread changes in carbon dioxide concentration.
Others say that it does.
Evaluate the advantages and disadvantages of collecting data in this way when studying
changes in global carbon dioxide levels.
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(iii) Suggest and explain a reason for the small fluctuations on the graph.
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B3(f) Jan 2013
6 Environmental change can be measured using both living and non-living indicators.
(a) Describe and explain how named examples of these types of indicators can be used to
monitorchange in particular environments.
The quality of written communication will be assessed in your answer.
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B3 (g) Variation
Summary questions
Use the following words to complete the sentences below.
adaptations adaptations minerals minerals camouflaged large spines stem stems ratio fur cells plants compete mates cool competitors fat food light light volume behaviour water water water water water water thin small
All living things have ……………..…………….., which help them to survive in the conditions where they live.
Animals which are adapted for cold environments like the Arctic are often …………………., with a small surface area to volume ……………..
They have thick insulating layers of ………….. and …………...
Changing coat colour in the different seasons allows animals to be ……………..…………….. all year round.
Animals which are adapted for hot, dry environments have adaptations which help them keep ……………. and avoid …………….. loss.
These include a large surface area to ……………….. ratio, …………………. fur, little body fat and ……………………….. patterns which help them avoid the heat of the day.
Cacti are ……………… which live in the desert.
They have two main ………….…………. to help them survive.
Their leaves are very …………… , have ………………and they store ……………… in their ………….
Animals often compete with each other for …………….. and …………….
They also compete for …………..
Animals have adaptations, which make them good ……………..…………….. for food and water.
Plants ……….………. with each other for …………, for ……...... and for …………..……..from the soil.
They need ……..….. and ……..….. for photosynthesis.
..……....….... is also needed to keep the plant………. rigid.
Plants need ..……....….... so they can make all the chemicals they need in their ………...
B3 (h) Evolution
The process of evolution has produced many new species.
Explain how evolution produces new species.
The quality of written communication will be assessed in your answer.
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B3 (l) Biodiversity (Jan 2012)
Biodiversity and sustainability are important for life on Earth.
(a) Explain what is meant by biodiversity.
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(b) Write down two reasons why biodiversity is important.
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(c) Explain what is meant by sustainability.
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[Total: 6]