David Hume (1711 to 1776) David Hume Ernst Mach (1838 to 1916) Ernst Mach Karl Popper (1902 to 1994) Karl Popper was
Category:Scientific Method
CO2 & Photosynthesis…
This Twig Prep page has a good video describing an experiment to determine if light and carbon dioxide are necessary for photosynthesis. I thought I would describe an experiment with CO2 as the only independent variable, similar to one I saw in an exam paper several years ago. If nothing else it will remind you about a …
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Plant Nutrients Part Deux…
Shortages of different minerals produce different symptoms. (The picture above is from the wonderful but sadly now defunct Tomato Headquarters website – one day the tomatoes will overthrow their oppressors!) It illustrates the visible changes that occur in the leaves due to different deficiencies. Unsurprisingly, a shortage of magnesium leads to pale coloured leaves – …
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A La Pharmacie…
A pharmacy visit in France is slightly different to one in England. It is often more akin to a doctor visit as they are able to hand over medications that, in the UK, would require a doctor’s prescription. I have friends who tell me that they stock up with medications whenever they visit France so that …
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Magnetish…
You may not notice anything different here but mysterious and wonderful things have happened. Firstly, I have added a ‘Community’ page for you to explore. Fill in the registration page and I will give you access when I have time. Use it wisely! Secondly, there are new links in the ‘Links’ menu. You should especially …
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Miracle Drink…
Yesterday, a friend sent me a link to “This Miracle Drink Prevents The Spread of Cancer”, which was posted on a website called ‘Natural Cures Not Medicine‘. They asked me for my ‘thoughts’ knowing that I enjoy looking at medical claims on non-medical websites. It would be easy to dismiss the story straight off without visiting …
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Horrible Histories…
This is a sort of experiment to see if people who could not previously see my posts can now see my posts (do comment – you know who you are…) It is also rather a fun song from the BBC. Questions… Who came up with ‘natural selection’? Suggest a unique characteristic of mammals. Suggest one …
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Corylus Cornuta For Tearless Teething…
“…it is a tale Told by an idiot, full of sound and fury, Signifying nothing.” Macbeth Act 5 Scene 5 I often hear it said that ‘even a child of 12’ knows enough science to dismiss some of the extraordinary assertions of those selling unusual cures for diseases. I know you and so I think …
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The Trouble With Two Brains…
Just a little video (actually rather a long 10 minute one!) because Plutonium199 mentioned the corpus callosum in answer to a question on a previous post about the brain. The corpus callosum is the part of the brain that enables the right and left hemispheres to communicate. If it is damaged or removed (for example …
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More About Chemical Bonds…
I wrote a few months ago, in response to a question from Felix, about the energy changes that occur when reactions happen. Some reactions are exothermic (that means they give out heat) whilst others are endothermic (which means that they absorb heat). Exothermic reactions are hot and endothermic ones are cold. If you have a …
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