Putting a pin in a piece of wood so the density can be measured. It came out at 0.92 g/cm3 with no wet fingers.
Thursday 23 June 2022
Wednesday 22 June 2022
Investigating rates of reaction
Looking at the rates of reaction of vinegar and chalk. The hardest problem to solve is how to get a full measuring cylinder of water with no air bubbles. Clingfilm is the answer and works really well.
Tuesday 21 June 2022
Looking at E/Z isomers
Chair, boat, cis trans, E-Z confuses the students until they get hold of the models and can create the different forms and see that they are different. Doing this quickly is difficult with some system but with the @snatoms it is simplicity itself.
Monday 20 June 2022
Crushing Chalk
Looking at rates of reaction, particle size. And the best bit of the experiment was crushing the large bits of chalk and making it into a powder.
Sunday 19 June 2022
Plancks Constant Apparatus
The students were horrified when they worked out the error in using this apparatus at over 50%, so we spent a lot of time getting the errors down to around < 10% and getting some reasonable figures for Plancks constant.
Saturday 18 June 2022
Clinostat
My new clinostat has arrived so we can now have a go at some tropism experiments, demos and videos. I cam hope to do a series of time lapse videos of the seedlings growing and not bending towards the light.
Friday 17 June 2022
Pasco metal Metre Stick
At the other end of the ruler the two are together but the new wooden metre stick is warped and is not straight. It isn't even 1 metre. I believe in giving the students the best equipment so that they can get the best results.
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Order of Reactivity
Order of reactivity of metals - this was a tough one for the students because they had to devise their own experiments; with a lot of help, ...
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Negative feedback is a difficult concept to try and get over so I tried using a balance board and the @pascoscientific smart cart strapped...
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Getting a classic set of results for the titration of NaOH and HCl is not that difficult but it is nice when we can get students to this ...
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Mechanics: the grand meeting of Maths & Physics! Using strobe light & a ball drop for gravity-acceleration calculations and SUVAT fo...