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  • Environmental Studies Factsheet: 34. Forests and Nutrient Cycles

    Environmental Studies Factsheet: 34. Forests and Nutrient Cycles

      Biological significance of forests • Forests encourage biodiversity by maintaining shelter, habitats and niches. Don’t confuse habitats – the place where an organism liv...

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  • Environmental Studies Factsheet: 35. Answering Exam Questions on Radioactivity

    Environmental Studies Factsheet: 35. Answering Exam Questions on Radioactivity

      The half-life of a radioactive isotope is the time it takes for half of the atoms of that isotope to decay. Most naturally occurring radioactive substances and many fission products are u...

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  • Environmental Studies Factsheet: 36. The Paired t-Test & When To Use It

    Environmental Studies Factsheet: 36. The Paired t-Test & When To Use It

      The t-test is widely used within investigation work. This Factsheet will tell you when and how to use the paired t-test. Hypotheses The t-test is used to compare two means (the mean is the n...

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  • Environmental Studies Factsheet: 37. Greenhouse Effect & Kyoto Update

    Environmental Studies Factsheet: 37. Greenhouse Effect & Kyoto Update

      Greenhouse effect basics: • Incoming radiation from the sun warms the Earth’s surface • The Earth’s surface re-radiates energy back to space as infrared radiation &bul...

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  • Environmental Studies Factsheet: 38. Breeding: The Dairy Cow

    Environmental Studies Factsheet: 38. Breeding: The Dairy Cow

      There are about 12 million cattle in the UK, which are raised either for milk or beef. Breeding cows or any other domestic animal or crop involves a series of decisions. The first qu...

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  • Environmental Studies Factsheet: 39. CITES

    Environmental Studies Factsheet: 39. CITES

      What is it? An international agreement between governments of 160+ countries. Joining is voluntary but, once joined, a country has to agree to the rules. The aim is to make sure trade in...

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  • Environmental Studies Factsheet: 40. Non Metal Minerals

    Environmental Studies Factsheet: 40. Non Metal Minerals

      Non-metal minerals such as granite are vitally important to the UK economy; we have many important uses for them, such as for roadstone, building stone, bricks and glass. As the UK p...

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  • Environmental Studies Factsheet: 41. Mann-Whitney U-test

    Environmental Studies Factsheet: 41. Mann-Whitney U-test

      The Mann-Whitney U-test is commonly used in investigations to measure whether there is a significant difference between two sets of data - for example, whether more of a particular kind o...

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  • Environmental Studies Factsheet: 42. Zonation & Succession

    Environmental Studies Factsheet: 42. Zonation & Succession

      Students commonly confuse the terms zonation and succession. This may be because both processes involve a change in species. However, they are very different processes. This Factsheet exp...

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  • Environmental Studies Factsheet: 43. Answering Exam Questions: Weathering

    Environmental Studies Factsheet: 43. Answering Exam Questions: Weathering

      Weathering comes up on every exam paper – there isn’t really much to learn so this should be a question that everyone does well on. But it isn’t ! In order to do well on...

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