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Hydrogen bonding and the forming of a snowflake

Water molecules are polar molecules, the electronegative  oxygen with two pairs of lone electrons providing a ‘slightly’ negative charge that acts with the ‘slightly’ positive hydrogen atoms to form the incredibly important hydrogen bonds, as illustrated here. It is the dipolarity of water molecules that give rise to the cohesive, adhesive, thermal and solvent properties that you need […] Find out more

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Adaptations of plants in deserts

When we think about plants and how they adapt to deserts what do we think? The video systematically reviews the desert environment and the ways in which plants have found a way to survive such inhospitable climates, together with animals which call it their home. [youtube id=”TlbpYeuVKpI”] These amazing pictures from the Atacama desert on the […] Find out more

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The falling leaves of Autumn

One of the most common questions I am asked when teaching plants is why do the leaves of deciduous trees change colour before they fall off in autumn. To answer that question I have come across this excellent video: [youtube id=”JWva5AaDkXw”] Within subtopic 2.9 you will also have opportunity to separate and identify the photosynthetic […] Find out more

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D.1 Human nutrition – essential nutrients

Not all nutrients required by the body, are synthesized by the body. An example of these are the essential and non-essential amino acids. Essential amino acids are those that are not synthezied and are therefore “essential” in our diet. FYI – You do NOT need to learn the names of the essential or non-essential amino […] Find out more

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Using a simulation for your IA

There are several options available to you when conducting your Internal Assessment as part of the Biology diploma. These include: 1.Hands-on experiment 2.Use of database for analysis and modelling 3.Extraction and graphical analysis from a database 4.Simulation (interactive/open-ended) 5.Hybrid hands-on + spreadsheet/database 6.(Qualitative and quantitative data are valid). This posting is focussing on computer simulations. […] Find out more

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TED talks / Google Science awards and the COOLing Earth

Biology at the micro level can often feel a conceptual study of processes that have been inferred from abstract data, such as the Kreb’s cycle or DNA replication. The following TED video offers a glimpse into the computer generated visualizations of the processes themselves. [youtube id=”WFCvkkDSfIU”] This video will hopefully provide inspiration as it highlights three […] Find out more

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