ATL in Biology
Enhanced Greenhouse Effect. Free
Beginning with a short introduction / recap of the greenhouse effect, this simple experiment illustrates the principles of the greenhouse effect. Heating beakers of gases using sunlight or even bright...
ATL in Biology
Carbon Cycle Skills
The size and speed of carbon flux between different carbon reservoirs and the processes responsible give students a detailed understanding of the carbon cycle. This lesson begins with the identification...
Activities
Describing communities (2025)
This short theoretical lesson looks at the interactions of organisms in ecosystems. Many of these interactions involve communication between animals using sounds or chemicals. The three activities begin...
eBook
C4.1 Populations & communities - student friendly summary
Blue text shows extra clarification or guidance. Guiding questionsHow do interactions between organisms regulate sizes of populations in a community?What interactions within a community make its populations...
Activities
Lincoln index - model answers (c)
Year Number of banded birds Number of banded birds caught the following year Total Catch of birds in the following year. Estimate of total USA duck population 1920 238 31 5 000 000 38.4 million 1921 382...
Activities
Fisheries management - model answers (c)
This page shows suggestions of model answers for the activity on the Fisheries and populations page. Of course there are alternative correct answers possible in places, this is not a mark scheme. Fisheries...
Activities
Sustainable fisheries - model answers (c)
This page shows suggestions of model answers for the activity on the Fisheries and populations page. Of course there are alternative correct answers possible in places, this is not a mark scheme. Sustainable...
Activities
Invasive species - Model Answers
The two populations don't seem to follow the same trend.Both populations are low beteen 1960 and 1970.The decline in the Sea Lamprey population in 1960 was more rapid that the Lake trout decline in 1950sLake...
Activities
Predator prey relationships (2025)
In this activity students look at the role of predator prey relationships as density dependent factors affecting populations. The activities use fisheries and aquatic ecosystems as an example to look...
Activities
Quadrat sampling of populations (2025)
Simple quadrat frames can be used to sample plants in an ecosystem. The idea is that a regular sized frame can give a representative sample of the organisms in almost any location. A small patch of grass...