Food Chains and Food Webs
Ecological Pyramids
Vocabulary
Ecosystems
Energy in ecosystems
100
In a food chain you can tell which organisms eat other organisms by?
The way the arrow goes, the energy flows?
100
A type of pyramid showing the number of organisms at each trophic level.
what is a pyramid of numbers
100
The path of food energy from one organism to another in an ecosystem.
What is a food chain
100
Put the following in order from smallest to largest: population, ecosystem, community
population, community, ecosystem
100
when energy is transformed up a food chain the amount of energy reduces
what is the 10% rule
200
An organism’s feeding position in a food chain (e.g., primary, secondary, tertiary).
trophic level
200
A type of pyramid showing the total mass of living matter at each trophic level.
Pyramid of biomass
200
Overlapping food chains with different pathways for the flow of food energy in an ecosystem.
What is a food web
200
They are biotic and they break down dead material
What is a decomposer
200
Energy that is available at the start of a system is equal to the energy available at the end of a system
1st Law of Thermodynamics
300
What is the original source of energy in a food web?
What is the Sun
300
The usual shape of a pyramid of numbers when the base has the most organisms and the top has the fewest.
upright pyramid shape
300
The environment where an organism lives.
What is Habitat
300
Rocks, soil, water, pH, salinity are all
Abiotic Factors
300
Which law of thermodynamics relates to energy loss within an ecosystem?
2nd Law of Thermodynamics
400
How many consumers can there be in a food chain?
what is infinite
400
The shape when a single large producer supports many organisms at higher levels.
Inverted
400
All the living and nonliving things that interact with each other in an environment.
What is ecosystem
400
what limits coexistence and leads to competition between organisms?
Limited resources
400
The form of energy that is lost from a food chain
What is heat energy?
500
What organism in this food web would have the largest population?
Phytoplankton
500
What is the main ways energy is lost between trophic levels.
waste and respiration
500
The role that an organism plays in its habitat.
What is Niche
500
An ecosystem is a location on Earth that includes which type of components/factors?
Abiotic and Biotic
500
If a producer has 1340 J of energy, how much does the tertiary consumer have?
1.34J of energy because only 10% is passed on
PC= 134
SC= 13.4
TC=1.34