In the previous lesson we learnt all about atoms and the elements in the periodic table. In this lesson we learn about elements and compounds which are known as pure substances.
In the ecosystem there are different levels of ecological interaction between populations and communities. In this lesson we look at the different components that we find in ecosystems namely biotic and abiotic components and what their influences are.
We look at the interaction between biotic components in the ecosystems. The interactions that we focus on include symbiosis, competition and feeding relationships in the ecosystems
