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Introduction In this demo, the teacher creates a beautiful rainbow of colours in a demonstration tube using universal indicator and a dilute acid and base. Discussion Universal indicator can be used... read more
https://youtu.be/NVxvcS9lJ_I Mr. Key outlines how we use numbers in science, with specific regards to precision and significance. Please note that all questions, comments and critiques are welcome.... read more
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... read more
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