Australia's Science Forum

judy2018 wrote: ↑22 Jun 2023, 10:59 Hi All
Do teachers have to do a RISK ASSESSMENT for all EXPERIMENTS ?
Thank you
Judy

In NSW , as long as they follow the requirements of the CSIS , then they are .

Actually sounds like a great idea Marama :thumbup: I was wondering how much the temp of the water would throw the accuracy (as density changes with temp ) , but it looks pretty damn good up to at least room Temp .But at higher temps it is still significantly more than glassware . °C .0 .1 .2 .3 .4 ....

I made up some little wooden holders after the kids kept knocking them over in the Labs and spilling the Storage juice .Also put a little warning notice on it .

PS , thanks Briony for sending me a pic .

Good to know Macca,
I tried a similar method
viewtopic.php?p=47842#p47842

viewtopic.php?p=47854#p47854

macca wrote: ↑08 Jun 2023, 08:39 Bottle of Black Douglas would be lovely lol

Done ......if you still are chucking them

Anna Z wrote: ↑07 Jun 2023, 15:50 I'll pay you $20 towards beer for you...send them down here

$30 ....and the beer

Macca ,
If you are going to throw them out , post them to me . They are safe to send through the mail .

We got the 10ul ones from Southern Bio too . They have the dual action . Push and release to draw up sample push and extra push to release sample . Now you might think how hard can it be to use a micro pipette? Despite demonstrating to students multiple times about how to load and dispense sample , ...

I used our Microwave ( which was the HTs old one from home ) to make Agar plates after learning about it from another Labbie at a Collegial meeting . It certainly boils agar very well and if you aren’t quick on the button , it sure does make one hell of a mess . I have do doubt it would work as a st...

Always remember that pressure cookers are sold in shops where idiots can buy them . They have to be made idiot proof and safe or we would be hearing reports on the news of people being killed or badly burned by them . Depending on the size if them , you’ll be lucky to fit more than about 25 plates i...

We tried the flint lighters for lighting Oxy torches but there was no way the kids , especially the younger nes could handle them . One of our teachers tried cigarette lighters and they were very successful . Only two went into the class room each prac . We gave up on little matches and now use the ...

When I first started , I was told by my off sider to store them in the fume hood until the GA lit a fire to burn off excess green waste then bring them over and chuck’m on the bonefire . I knew no better but after about 6-9months I was asking when was the bonefire ment to happen . Discovered that th...

elaruu wrote: ↑25 May 2023, 09:52 Hmmm. He says it is an essential part of the curriculum.....

I’d say he’s talking out is bottom.

Is all of them or just one or two ? Sounds like you have done pretty much all you can . If they are the ones with Teflon tips , I’m thinking the tip is damaged . You could try slicing a small bit off the end as parallel as you can with a Stanley knife . Failing that , the round filing cabinet might ...

Yes I would always recommend having a spark gap set to the widest setting where it will still arc consistently while using anything connected to an induction coil . If the device connected requires less voltage then the spark will stop . That is OK .

I got one of these power supplies for ours . https://www.chemtalk.com.au/viewtopic.php?p=48804#p48804 I was looking at your holder and it reminded me . We got one of those in our set of tubes from serrata ( MTA) . Teacher whinged that all the tubes were glowing . She was kinda right . If the probe w...

Annette , care to throw up a picture of the induction coil and even the tubes

LOL , I’m playing house husband until I can find a job .
Still pop in when I can .Miss the job and the forum .

Edit : one less step in the process , but also reduces risk as no Sodium Hydroxide needed . ….. although Sodium Silicate is Corrosive anyway . Hmmm ,this just reminds me . Our retired Chem teacher left a gas jar full of Chemical garden in his display cabinet in his class room. He knew what it was ,a...

Whenever we did it,we just used Sodium Silicate solution that was in the Chem store .IIRC ,ours come from Silform .