Organization
This is the combination of all living and nonliving things.
Ecosystem
The amount of energy that is transferred to the next level
10%
What is the trophic level with the lowest energy?
Tertiary Consumer
What are the first organisms to occupy a bare site?
Pioneer Species
Keystone Species
An individual, living thing
Organism
Where does all of the energy in an ecosystem come from?
The Sun
What trophic level has the highest energy?
Producers
Which type of succession occurs where no life previously existed?
Primary Succession
Invasive Species
All of the living things in a given area
Community
What happens to the remaining 90% of energy during energy transfer?
It is lost as unusable heat
If a mouse eats grass, and then a eagle eats the mouse, what trophic level is the eagle?
Secondary Consumer
Which type of succession occurs where a disturbance happened, but left the soil in tact?
Secondary Succession
What is the name of a species that indicates the overall health of the environment?
Indicator Species
All of life on Earth
Biosphere
If a squirrel has 900 calories of energy, how much energy does the fox that eats it obtain?
90 Calories
Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?
Because the energy at the higher trophic levels is small
What type of succession?
A wildfire burns a forest down.
What is the name of a species whose conservation indirectly protects the rest of its environment?
Umbrella Species
Population
The first law of thermodynamics
Energy Cannot be created or destroyed, only transformed
What is the name of organisms that recycle nutrients and break down dead organic matter?
Decomposers
Climax Community
What is the name of a species that can only be found in one geographical location on Earth?
Endemic Species