This document contains power point slides about ecosystems. It defines a food chain as a hierarchical series of organisms with each dependent on the next as a food source. It explains trophic levels as the feeding positions in a food chain, such as producers, herbivores, and carnivores. It describes an ecological pyramid as a graphical representation showing the biomass at each trophic level in an ecosystem. It also outlines the carbon cycle which is based on the movement of carbon between air, water, and living things via carbon dioxide. The slides were edited from other sources and are meant to teach about ecosystems, food chains, trophic levels, ecological pyramids, and the carbon cycle.

1. Power point slides by
Mabusela m.g

2. The following slides
have been edited
from other sources

3. Topic
Ecosystem
Enjoy

10. Food Chain is a hierarchical series of organisms
each dependent on the next as a source of food.

11. Trophic levels are the feeding position in a food
chain such as primary producers, herbivore,
primary carnivore, etc. Green plants form the first
trophic level, the producers.

12. An ecological pyramid is a graphical representation
designed to show the biomass or biomass
productivity at each trophic level in a given
ecosystem.

13. The carbon cycle is based on carbon dioxide (CO2),
which can be found in air in the gaseous form, and
in water in dissolved form.

16. Thanks for your time I hope you found
these slides useful and you learnt a
thing or two from them

17. Reference list
• Sonia Sanchez, Maestra de Ingles. C.E.I.P.
• Milita Haldar, Lecturer at Shri Ramsuaroop Memorial Group of
Professional Colleges.
• Mr. Ruffin, A Teacher at HCS