Checkpoint: plant indicators, smell and soil
Five ideas from the last three lessons. Answer, read the note, and try again.
Red rose extract turns green in a liquid. What is the liquid?
One liquid turns rose extract red. Another turns turmeric paper red. Which one is acidic?
A drop of a liquid is put on an onion strip. The smell fades. What does this point to?
Blue litmus turns red in a soil mix. What is the soil?
Why does a factory treat acidic waste before it enters a lake?
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