Making Liquid Nitrogen From Scratch! – Veritasium

Making liquid nitrogen is hard – in fact up until 150 years ago scientists doubted whether it was even possible to liquefy nitrogen. In 1823, At the royal institution in London, Michael Faraday first produced liquid chlorine, kind of accidentally by putting it under high pressure. He similarly liquefied ammonia. Continue reading

Why Don’t Birds Lay Square Eggs?

What is ”egg-shaped” even? I used to think it was the shape of a chicken egg. Then one day I saw a collection of eggs from lots of different bird species, and I realized just how many different kind of egg shapes there really are! I had to know why. And it turns out a couple teams of scientists had wondered the same thing. Here’s what science says about why eggs are egg-shaped, if that’s even a thing, which I’ve learned it might not be. Evolution of bird eggs, go!

How Much Fun Can We Make With Electricity? – by Otto Weavers

This is a  2 week low safety risk, high engagement, creative, design, build, inquiry-based  and presentation activity that involves  students  in developing a thorough understanding of current electricity and how to apply that to electrical circuits in a meaningful and fun way.

Click here for more information

Thanks for the ideas Otto!

Cannabis use highest in Halifax, while Edmonton had highest use of meth, wastewater samples show | CBC News – submitted by Milan Sanader

Statistics Canada tested wastewater samples from five urban centres for illicit drugs and cannabis, and the results are a snapshot of what substances are more common in those Canadian cities.

Source: Cannabis use highest in Halifax, while Edmonton had highest use of meth, wastewater samples show | CBC News

Images from a Cell Phone Camera – submitted by Dave Gervais

This is an image of an insect taken from a Huawei p 30 pro cell phone camera. When I compare that to images that I took in 1978 using a really good dissecting microscope with an optical camera, this is incredible. I could easily take these images and identify this insect using a good dichotomous key.

The cost for this cell phone camera is comparable to that of a good dissecting microscope attached with an optical camera, around $ 1400 dollars. Either just with the cell phone, or equipped with the hand held circular motion free tripod, this device could greatly improve field trip images without the need to take specimens back to the lab. What a great purchase for a science department!

 

Question:   Can you identify this insect from the banks of the Ottawa River?  Send your answers to info@stao.org, attention safety committee. Answer will be posted next week.

Dave Gervais

Chair STAO Safety Committee

 

 

Thanks for the submission Dave !

 

Scientists may have detected a black hole devouring a neutron star | CBC News

First, astronomers made history when they detected a gravitational wave from two black holes merging. Then it was two neutron stars. Now, astronomers believe they’ve detected a gravitational wave coming from another first-time discovery: a black hole swallowing a neutron star.

Source: Scientists may have detected a black hole devouring a neutron star | CBC News