Nobody is expecting you to now all of this – but I think it is helpful to add a bit of context to things. And it is interesting with a good song at the end! The current standard model has four fundamental forces explaining what we see in the observable Universe; gravity, electromagnetism, the weak …
Continue reading 12 Particles Of Matter And 4? Forces Of Nature…
Author:SFScience
Retired Schoolmaster living in Wiltshire and Vendee France
Plant Nutrients Part One…
I have often mentioned the importance of nitrogen (in the form of nitrate) to the growth of plants. It gets mentioned pretty regularly in the questions after several posts and when I wrote about crop circles, Fritz Haber and Norman Borlaug. Plant nutrients often appear as part of exam questions so please forgive me if …
Continue reading Plant Nutrients Part One…
Force & Linear Motion…
Time, Distance & Speed The average speed of a moving object is the distance it travels divided by the time it takes. At CE, this will usually be calculated in metres per second (m/s). The equation to use is… speed = distance ÷ time (or s=d/t) You may also need to calculate distance or time, …
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Atoms & Molecules Quiz…
It will really help if you have read this post before you try this. Please click here to go to the Quizizz on Atoms and Molecules.
Biological Catalysts…
A catalyst is a substance that enables (or speeds up) a chemical reaction without itself being altered by that reaction. Catalysts, therefore, are not used up as they influence a reaction. Enzymes are biological catalysts – in other words catalysts that operate within living things. The names of enzymes are usually made by putting -ase …
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Density…
This picture neatly captures the idea of liquids having different densities. The lowest density liquid floats on the top and all the other layers stay as they are because of their relative densities. This must have been done very carefully because some of these liquids will mix with one another (miscible). Immiscible liquids will not …
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Reduction and Oxidation…
We have seen reduction and oxidation as the removal and addition of oxygen. This is a perfectly good definition but we can use the words in a slightly more subtle way. We can talk about reduction as the gain of electrons and oxidation as the loss of electrons. Oil RiG – oxidation is loss, reduction …
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Atoms & Molecules…
There are about 100 different kinds of atom naturally occurring on Earth. They are the defining structure of an element and cannot be broken down by any chemical means. They consist of a dense nucleus, containing protons and neutrons, surrounded by a cloud of electrons. They may exist naturally as single atoms but more commonly …
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Genetics Videos…
These videos might help to remind you a little about the genetics we have discussed in class.
The Greatest Show On Earth…
Another Symphony of Science video but about Evolution this time. The two other SOS videos I have posted are here and here.