Trophic Levels
Food Chains and Food Webs
Levels of Organization
Ecosystems
Vocabulary
100
What is the source of energy of the trophic levels?
The sun
100
What are the producers in the food web?
The grass and trees
100
One single living thing in an ecosystem
Organism
100
If birth rate is higher than death rate, the population is..
growing
100
an area where two or more ecosystems overlap
Transition zone
200
What is the total mass of all living organisms in an ecosystem at one time
Biomass
200
Name a primary consumer in the food web
Grasshopper, mouse or deer
200
organisms of the same species living in the same area at the same time
Population
200
Name at least 3 things that ecologists look at when studying a population
density, age structure, mortality patterns, limiting factors, carrying capacity, birth rate and death rates
200
the maximum number of organisms in a population that an environment can support over a long period of time
Carrying Capacity
300
unique role of an organism in its environment
Niche
300
Name a secondary consumer in the food web
The frog, eagle or snake
300
the population of different species living in the same place
Community
300
the number of individuals in a species that die at certain ages is the..
mortality pattern
300
What's the difference between a habitat and a preferred habitat?
A habitat meets all the needs of an organism, a preferred habitat provides an organism with an advantage over other organisms
400
organisms that get energy by breaking down the remains of dead organisms or animal waste
Decomposers or detritivores
400
What role does the snake play when it eats the mouse?
Secondary consumer
400
All the living and non-living things in the world in a closed, self sustaining system
the Biosphere
400
What caused the moose population to increase from 1990-1995?
The wolf population shrank
400
the proportion of individual organisms at different ages is the..
Age structure of a population
500
How much energy is transferred through each trophic level?
10%
500
What role does the eagle play when it eats a frog?
Tertiary consumer
500
Name at least three things that somethig needs to be considered an organism
it's Made of cells, Reproduces, Grows and develops, Responds to their environment and Uses energy
500
Why did the moose population not experience an increase until 1990, when the wolves died off in 1980?
Because cause and effect relationships do not play out immediately, they take time to be shown in real life
500
Name at least 3 of the criteria needed for a habitat
Right climate, Enough space, Supply of food and water, Gasses to breathe, Shelter