Cabbage Patch Indicator

pH scale

Red cabbage extract will change colour depending on acidity and act as an indicator of a potential chemical change.  Acidity is measured on a pH scale where pH stands for “potential for Hydrogen”. Acidity is caused by hydrogen atoms that have lost their electrons and are roaming free in water [H+]. The scale goes from 0 to 14. The colour scale represents the concentration of these positively charged hydrogen ions [H+]. Acid, or low pH, gives foods a sour taste, and base or high pH is usually bitter.

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SciNews, Sunday, November 27, 2016

Science and First Nations traditions converging; men lagging in life expectancy; old blood’s influence on aging; Trump softening tone on climate change; Nova Scotia’s underwater windmill; author’s speculations of future; huge ice deposit on Mars – just a few of the themes in today’s eclectic collection of SciNews.  Share these stories with your students and get them excited about science.

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SciNews, Thursday, November 24, 2016

Weakening of heart muscle from marijuana use; gray jay Canada’s national bird; carbon is not the enemy; units of measure upgraded; predicting storms; Pluto very active – just a few of the themes in today’s eclectic collection of SciNews.  Share these stories with your students and get them excited about science.

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