About This Lesson
Contains information on lichens and water invertebrates and how they indicate levels of pollution. Last slide is a how science works question looking at data and indentifying variables and errors.
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Contains information on lichens and water invertebrates and how they indicate levels of pollution. Last slide is a how science works question looking at data and indentifying variables and errors.
my class were a bit harsh and voted 4 needs question on invertebrates (they say) 9 set 5 HGS
thank you