Symbiosis
Food Pyramids
Food Web
Limiting Factors
100
The relationship between two different organisms over a long period of time.
What is symbiosis?
100
How a food pyramid illustrates the amount of energy used in an ecosystem.
What is the energy decreases as you move up?
100
How a food web or chain illustrates energy in an ecosystem.
What is the flow of energy by arrows?
100
Shelter, nutrients, space, sunlight, and water
What are limiting factors of a natural ecosystem?
200
Relationship where one organism benefits and the other does not benefit but isn't harmed either.
What is commensalism?
200
The name of organisms that belong in the 2nd trophic level. (What eats producers?)
What are the primary consumers?
200
The grasshopper to the owl in the food web below.
What is an energy source or prey?
200
The effect to the population of prey animals when predators increase?
What is decrease in number?
300
The type of symbiosis.
What is mutualism?
300
If the fish eats producers, then the seal eats the fish. What level consumer is the seal? 
What is a secondary consumer?
300
The missing part of the food web besides the energy source for the producers.
What are the decomposers?
300
According to the graph below, the reason why the rabbit population is so high COMPARED to the predator.
What is that there are fewer predators?
400
When two similar trees compete for the same resources.
competition
400
The organisms that complete the cycle of energy/food in a natural ecosystem by breaking down dead matter.
What are decomposers?
400
Where the grass obtains its energy
What is the sun?
400
The limiting factor trees would be competing for when there are too many trees in an area.
What is space?
500
The dog in the relationship between the dog and the flea
What is the host?
500
Through what other organism does the bird get its energy, besides from the grass?
What is the grasshopper?
500
The effect on organisms, if their habitat decreases.
What is a decrease in their numbers/population?