Australia's Science Forum

Dear Ellice We have just done the milk and rennin prac. We used treatments. Control -10 ml milk. Acidic - 75 ml milk and .25 ml vinegar Basic - 1/2 tspn bicarb soda and made up with milk to 10 ml. (all go in water bath of 35-40 degrees celcius) The previous year we used 1/2 ml of vinegar to make mil...

Thanks Rosalie, I'll do that.

How did your elephant's toothpaste go? Larissa is really enjoying this unit and all the pracs that you are organising for them!
Cheers
Tina

Oh Kimmy
that sounds so yummy. I am soooo hanging out for morning tea now. You have made me very hungry!
tina

Hi
Can you tell me what a fun fly stick is and where you get them from? Are they expensive?
Thanks
Tina

Hi Rita I think from memory we use 6% hydrogen peroxide. Either that or 3%. I only ever stock these two strengths. The 3% one you can buy from the chemist. You wouldn't need stronger than 6% I dont' think but I can't find my records on it. Someone else may prove me wrong. We tend to do that exp. for...

Thank you, thank you, thank you!!!! :clap3: :clap3: :clap3: Thanks to your hair dryer tip and an hour of my time, I now have 3 working max/min thermometers. The hair dryer at its max temp setting got the air bubbles moving up, though sometimes the mercury and the marker too. Had to be careful the me...

Hi
I haven't seen any info about St Mary's yet. Could someone email me a flier/form please.
I have accommodation and transport booked (thanks Liz).


Tina

Thanks everyone. I will go and try the hairdryer trick, though those new digital ones sound so tempting...

i don't need them now till next wednesday or so, Rosalie, so I will try fixing these first. Thank you so much for the offer. I really appreciate it.

Tina

Hi I have 7 max/min thermometers. One works! I desperately need two. I got a second one the other day and it got dropped in class and of course doesn't work anymore!!!! I have worked out how to use magnets to move the blue bits up and down and get them unstuck from the mercury. What about air bubble...

Hi Noona The kids sit in the middle of the room and the benches are around the outside. Another thing is that there is someone in a wheelchair starting here next year. What do other schools do. I presume we will need to make one workbench lower than the others to allow this person access to pracs. T...

Hi I know there have been previous threads on this but I cant find what I am looking for. Are there any regulations that govern bench space per student in a laboratory in NSW? Or any written guide lines on lab design? We want to push to have one of our labs to be altered. For starters the benches ar...

Hi I was just reading the chemwatch newsletter (on the chemwatch site). It was saying that there is a function to generate chemical risk assessments and print them out. You type in which chemicals you are going to use together and the sort of quantities you will be using and it comes out with a repo...

Thank you so much!
Tina

Hi
Does anyone remember , from St Mary's conference last year, how to make the model lungs using, I think, a cup and a balloon? It was the kind of thing that a whole class could make, rather than the belljar lung model that you use as a demonstration.
Thanks
Tina

Hi
We have just been collecting ferns, moss, lichen, gymnosperms and flowering plants to classify.
And we have looked at pond specimens under the microscopes.
Other things are looked at on paper. I don't have to collect them.
Cheers
Tina

Hi Graeme
Could I possibly have your exact recipie. I am keen to try something different.

Thanks:thumbup:
tina

Hi Rosalie!
my metho has been used for the chorophyll extraction prac., and so is pretty green. Would you still use that in spirit burners, etc?
Thanks
Tina

Hi! On the topic of waste disposal, I have a bottle of conc nitric acid with a corroded lid. I have other waste to pick up next week. Should I include this, or try diluting/neutralising it and tip it down the sink? or try to get it into a new bottle? It is a 1 litre bottle. Same for a 2L of conc H2S...

Thanks from me too!
Tina

Hi Thanks for your replies! Why doesn't red onion need staining? Sounds like a good option to use. One of the teachers wants iodine solution as dark brown as she uses as an antiseptic on her cattle. I guess I could just try adding more iodine to the potassium iodide solution. Does anyone see any pro...