biology--student.blogspot.com
What I learnt in Biology this week.....: Succession
http://biology--student.blogspot.com/2012/04/succession.html
What I learnt in Biology this week. Friday, 13 April 2012. SUCCESSION = a directional change in a community of organisms over time. Succession is a change in the structure and species composition of a community, which occurs because of the canges caused by the preseence of established organisms, or by external influence. PRIMARY SUCCESSION occurs in an area where there is no soil or living organisms. So in areas like sand dunes (which display of seres of succession in the same place! STABILISING SPECIES ...
chemistry-student.blogspot.com
What I learnt in Chemistry this week.....: Transition Metals - the basics
http://chemistry-student.blogspot.com/2012/04/transition-metals-basics.html
What I learnt in Chemistry this week. Thursday, 5 April 2012. Transition Metals - the basics. With the written ISA coming up soon after we return, I thought it best to cover Transition Metals first, seeing as this is likely to be the basis of the paper. TRANSITION METAL = a metal that can form one or more stable ions. A d-subshell can fit 10 electrons in, so transition metals must form an ion that has between 1 and 9 electrons in this subshell. Scandium only forms one ion Sc. It is just [Ar]. Bidentate =...
biology--student.blogspot.com
What I learnt in Biology this week.....: April 2012
http://biology--student.blogspot.com/2012_04_01_archive.html
What I learnt in Biology this week. Friday, 13 April 2012. Do you remember all the sampling techniques we used to sample the habitat at the Braunton Burrows sand dunes on our lovely fieldtrip back last summer! Well hopefully you do! When sampling a habitat, there are 3 things we need to find out:. 1 What species are present. 2 The abundance of each species present. 3 The distribution of each species. Can find percentage cover by looking at the proportion of the quadrat's area occupied by a species. Succe...
biology--student.blogspot.com
What I learnt in Biology this week.....: Pyramids.....
http://biology--student.blogspot.com/2012/04/pyramids.html
What I learnt in Biology this week. Wednesday, 11 April 2012. I kind of missed this bit out so this will only be really short! Pyramid of numbers have limitations and you can get inverted pyramids so ecologists started to use biomass. Then a pyramid of energy was developed:. Calculate how much energy is released per gram. BUT, pyramids of energy have limitations too. Provide only a snapshot at one moment in time. Populations fluctuate over time, and this cannot replicate those changes. Per unit area (m2).
biology--student.blogspot.com
What I learnt in Biology this week.....: Sampling Methods
http://biology--student.blogspot.com/2012/04/sampling-methods.html
What I learnt in Biology this week. Friday, 13 April 2012. Do you remember all the sampling techniques we used to sample the habitat at the Braunton Burrows sand dunes on our lovely fieldtrip back last summer! Well hopefully you do! When sampling a habitat, there are 3 things we need to find out:. 1 What species are present. 2 The abundance of each species present. 3 The distribution of each species. Can find percentage cover by looking at the proportion of the quadrat's area occupied by a species. Explo...
biology--student.blogspot.com
What I learnt in Biology this week.....: Nitrogen Cycle
http://biology--student.blogspot.com/2012/04/nitrogen-cycle.html
What I learnt in Biology this week. Monday, 9 April 2012. DECOMPOSERS are organism that feed on waste from other organisms, or dead organism. Feed saprotrophically so are saprotrophs, i.e they release enzymes on too dead/waste matter which digest material into smaller molecules which are then absorbed into the organisms body where they are stored or respired to release energy. Nirtogen must be fixed. Converted into a more usable form e.g ammonium ions or nitrate ions. Leghaemoglobin mops up unwanted O2.
history--student.blogspot.com
What I learnt in History this week.....: Labour's creation of the welfare state
http://history--student.blogspot.com/2012/04/labours-creation-of-welfare-state.html
What I learnt in History this week. Thursday, 5 April 2012. Labour's creation of the welfare state. June 1941, Interdepartmental Committee instructed to study existing schemes of social insurance and make recommendations for their improvements = Beveridge report. This report has come to be regarded as singly the most significant social and policy document of the 20th century. Aims of the Beveridge report. Abolition of the 5 Giants - want, igornance, disease, squalor and idleness. March 1948 poll revealed...
biology--student.blogspot.com
What I learnt in Biology this week.....: Limiting Factors on Population Size
http://biology--student.blogspot.com/2012/04/limiting-factors-on-population-size.html
What I learnt in Biology this week. Friday, 13 April 2012. Limiting Factors on Population Size. Limiting factors stop the population size of a species increcreasing. Competition for food and water - light intensity and temperature. Competition for mates - pH. Availability of burrows and space - water and nutrients. Therefore, limiting factors can be either biotic or abiotic. DENSITY DEPENDENT FACTORS have more impact as popoulation becomes more dense. NOTE: we call death phase, declining phase instead.
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