What is the difference between these two pyramids?
In groups prepare a presentation explaining the difference. You must include
* What a pyramid of numbers is
* What a pyramid of biomass is
* How each is worked out
* An example of each including the organisms and the food chain
* The benefits of each
* The bad points of each
* Which one you think is easiest to understand
And the answer to the following questions:
Question:
1) Draw a food chain in the correct for the following organisms:
Ladybirds, Roses, Blackbirds.
2) There are 4 ladybirds, 20 Roses and 1 Blackbird. Use this information to draw a pyramid of numbers.
3) Draw a food chain in the correct order for the following organisms:
Stickleback, Pond Snail, Water Weeds.
3) There are 4 pond snails, 1 stickleback and 12 water weeds. Use this information to draw a pyramid of numbers.
Bonus Questions: What habitats will both sets of organisms live in?
Useful Links:
BBC
Useful Notes
Interactive workshop
Some good definitions
RSPB activity
If you finish all of these:
Ecological Relationships Quiz
Ecological Relationships and Year Seven Revision