A group of communities plus all the abiotic factors
What is ecosystem
100
The main source of energy in most ecoystems
What is the sun
100
organisms that eat other organisms
What is heterotroph/consumer
100
Energy ____________ as you move through a food chain
What is decreases
100
Process of converting nitrogen gas in the air into a usable form (ammonia, nitrate)
nitrogen fixation
200
Members of a particular species that live in one area
What is population
200
An organism that makes its own food
What is an autotroph/producer
200
All the interconnected feeding relationships in an ecosystem
What is a food web?
200
Amount of energy passed on as you move through a food chain
What is 10%
200
The rate at which organic material is created by producers (this increases when more nutrients are added)
What is primary productivity
300
The combined portions of Earth in which all living things exist
What is biosphere
300
ex: grass eaten by rabbit... In a food chain, what type of feeding relationship does this represent?
What is a herbivore/primary consumer
300
Introduction of a new species to an ecosystem. The species has no known predators.
What is an invasive species
300
cycles through the ecosystem
What is nutrients
300
process plants use to convert carbon dioxide into energy-rich carbon compounds
What is photosynthesis
400
group of ecosystems that have the same climate
What is biome
400
Process of using chemicals to make food
What is chemosynthesis
400
There is ________ energy at the producer level than at the consumer level
What is more
400
A nutrient that cycles very slowly, or is scarce
What is a limiting nutrient
400
2 processes that release carbon back into the air as carbon dioxide
What is burning fossil fuels, respiration, decomposition, diffusion.
500
Levels of organization, in order from smallest to largest. (6)
What is species, population, community, ecosystem, biome, biosphere
500
What tertiary consumers eat
What is secondary consumers
500
Organism that obtains nutrients by breaking down dead things.
What is a decomposer
500
This cannot be created nor destroyed
What is energy
500
DOUBLE JEOPARDY: what does too much fertilizer in the soil do to nearby rivers and lakes?
1. runoff
2. algal bloom (increase primary productivity)
3. a. block sunlight b. algae dies and decomposes, depleting oxygen for fish and other organisms