Indicators-making your own:

Re the experiment in Lower Secondary Science, Can you make an Indicator?:
Red cabbage, red roses, onion skin and black tea work but flowers from your schools garden make great indicators.
The following flowers work very well:
Pink Camellia, flame tree, Grevillea Robyn Gordon, sour grass, nasturtium- orange flower form, white (with purple back) daisy, red (and pink) pelargonium, Polygala, pink and red roses.
Simply grind a small amount in water with a mortar and pestle, filter if you wish and test with acids and bases.
Those which don’t work are lavender and dandelion.

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