Tree rings show human effect on climate goes back more than a century – The Globe and Mail

Tree rings can measure past climate because trees are sensitive to soil moisture. Scientists found over the past 120 years North America, Australia and the Mediterranean have been getting drier while parts of Asia, including India and western China, have been getting wetter Continue reading

What’s Better for Wounds: Scabs or Bandages? – YouTube

When someone gets a little scrape, it’s pretty common for them to cover it with a bandage while it heals. There are some people, though, who think it’s best to leave the wound uncovered and let your body do its healing thing. Who’s right? Science holds the answer! Continue reading

Grappling with Controversial Issues using Google Forms and Polleverywhere

What is this? Google Forms allows students to survey groups of people to get their opinions on key questions related to controversial issues (e.g., Reproductive cloning or Opt in vs. Opt out organ transplantation systems to relieve the organ shortage crisis).  They can combine the survey results with their own background research to make a recommendation to a governmental agency.

Polleverywhere is a polling website that is meant to be used with a live audience as people can see the responses of others.  This can be used to engage the audience if they choose to do a presentation.

How do I use this? The teacher can create a survey using Google Forms (watch the video link below that shows you how).  This data is automatically placed in an Google sheet and can be used to generate graphs that can be used to help students analyze and interpret the data.  Key graphs can be used in the student report or presentation.

Why use this?  Google Forms allows for easy collection and compilation of data.  This allows students to spend their time on analysis and reflection rather than counting up responses.  An additional perk is that the action of passing out a device about different issues triggers conversations that do not happen as much when using paper and pencil surveys.

Click here to download the complete resource.

Canada warming at twice the global rate, leaked report finds | CBC News

A leaked copy of a government report on climate change says that since 1948, Canada’s annual average temperature over land has warmed 1.7 C, with higher rates seen in the North, the Prairies and northern British Columbia.

Source: Canada warming at twice the global rate, leaked report finds | CBC News

Responding to Chemical Spills – by Flinn Scientific Canada

Introduction

No matter what precautions are taken, sooner or later an accidental chemical spill is likely to occur in your laboratory. A
responsible science teacher will take steps to prevent spills, make sure proper safety equipment is available to contain and
control a spill, and understand how to use the safety equipment. Continue reading

Why Is The Measles Virus So Contagious?

You might be surprised to hear that measles is 10 times more contagious than Ebola or the plague. How do epidemiologists quantify a disease’s catchiness? Hosted by: Stefan Chin SciShow has a spinoff podcast! It’s called SciShow Tangents. Continue reading

Why Dog Food STINKS!

Have you ever thought about how strange it is that dogs eat these dry, weird smelling bits of food for their entire lives and never get sick of them? This truly is a scientific puzzle and there are many different types of dog food formulas on the market. Some are designed for weight loss, long shelf life and making sure that your dog eats a balanced diet. This week on Reactions, you’ll see the real wonder of what’s behind the chemistry being used to make the perfect dog food kibble. Continue reading