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Human Hazards One
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Learning Focus: What is an ecosystem and how do they
function?
•What: learn about food chains for a specific place•How: construct a food web for the Antarctic•Why: to understand what an ecosystem is and how it works
Where do these get their energy from? Discuss with your partner.
Activate: What is an ecosystem?
An ecosystem is a natural system where plants and animals are closely linked to
each other and to the non-living environment around them (water, air, the
sun, rocks and soils)
Ecosystems can be small, such as under a stone or huge like the rainforests in Brazil.
Trophic levels
The flow of energyEvery ecosystem will have a flow of _____ through it. The main source of energy is ________ which is absorbed by plants through photosynthesis. This energy is passed on up through the _____ chain where ______ are eaten by animals which may in turn get eaten by other ______. Each level of the food chain is known as a trophic level.
Word bankPlants Sunlight animals food energy
energy
sunlight
foodplants
animals
Demonstrate: Who’s eating who?
TASK:• Cut out the pictures
• Using the clues on the written sheet stick the pictures in the right place on the food web
Let’s see if you’re right!
Self assess your answers!http://www.discoveringantarctica.org.uk/multimedia/flash/4_eating.html
Reflection…
So, in Antarctica:
– Who are the vegetarians?
– Who are the carnivores?
– Who is top of the food chain?
Learning Focus: What is an ecosystem and how do they
function?
•What: learn about food chains for a specific place•How: construct a food web for the Antarctic•Why: to understand what an ecosystem is and how it works