Transcript
Launch
Give an explanation to what is happening in the above graph that
shows a cow population? (where the arrow points)
Catalyst Review Remember that if a population goes over
the carrying capacity there are not enough resources to support it
What happened in this case was that there were too many cows which ended up eating ALL the grass and not allowing enough to regrow so the population actually declined below the carrying capacity.
A look ahead:
Wednesday- half day Friday- Review/Reteaching Next Monday- Review
Next Tuesday is the Unit Exam- start studying now!
Producer- makes their own energy Tree
Herbivore- Eats only plants for energy Deer
Carnivore- Eats only animals for energy Frog
Omnivore- Eats plants and animals for energy Human
Animal Diet Game
http://www.sheppardsoftware.com/content/animals/kidscorner/games/animaldietgame.htm
General Fact
In a food pyramid, the shape of the pyramid tells you the different amounts of energy
General Fact
Humans, as a whole, have a far greater impact on their environment than most species
Why?
Use more resources than most organisms
Problems
Global Warming Greenhouse effect Depletion of the Ozone layer Killing of harmless plants and
animals through pesticides Deforestation Using up non-renewable resources
Criteria for negative effects on the environment
Uses non-renewable resources Drastically alters the ecosystem,
environment and cycles Can lead to species displacement
Criteria for positive effects on the environment
Uses renewable resources Does not drastically affect the
environment Recyclable, reusable Maintains the desired ecosystem
interactions Does not disrupt cycles
Examples
Nitrogen Cycle Food Web Pesticides
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