Flame Tests are one of my favourite topics. Explaining the colours of fireworks to year 8 in an online lesson.
Crimson Lithium
Lilac Potassium
Yellow Sodium
Red Strontium
Apple Green Barium
Green Boron
Blue Green Copper
Students remember all the Circle Theorems so that they can solve the A-level problems. Finding the Midpoint of a chord, then finding a perpe...
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