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WorksheetsEcology Practice Quiz
Total questions: 20
Worksheet time: 11mins
What does "biotic" refer to?
Non-living components of an ecosystem
Living components of an ecosystem
Energy flow in an ecosystem
Nutrient recycling
What is an "abiotic" factor?
A living organism
A non-living component
A type of plant
A consumer
Which of the following best defines an "ecosystem"?
A community of plants
A group of different species interacting with their environment
A food chain
A single species in a habitat
What is a "community" in ecological terms?
All living and non-living things in an area
A group of similar species
Different species living together and interacting
A group of producers
Which of the following describes an "autotroph"?
An organism that consumes others for food
An organism that produces its own food
A type of decomposer
A predator
What does "heterotroph" mean?
An organism that creates energy from sunlight
An organism that cannot produce its own food
A plant that photosynthesizes
A type of bacteria
What role do "decomposers" play in an ecosystem?
They produce energy
They consume other organisms
They break down dead organic matter
They compete for resources
A "food chain" is best described as:
A complex network of species
A linear sequence of energy flow
A list of producers only
A diagram of abiotic factors
What is a "food web"?
A single chain of food interactions
A complex network of food chains
A model of energy loss
A description of abiotic factors
The "Rule of 10" refers to:
The total number of species in an ecosystem
The percentage of energy transferred between trophic levels
The number of decomposers in a food web
The maximum number of organisms in a community
What is "bioaccumulation"?
The process of energy transfer
The buildup of substances in an organism over time
The recycling of nutrients
A type of nitrogen fixation
"Biomagnification" occurs when:
Energy is lost at each trophic level
Toxins increase in concentration at higher trophic levels
Nutrients are recycled back into the soil
Producers absorb too much sunlight
A "keystone species" is one that:
Is the most abundant species in an ecosystem
Has a significant impact on its environment
Is a top predator
Is a primary producer
The process of photosynthesis can be summarized by which equation?
CO₂ + H₂O → C₆H₁₂O₆ + O₂
C₆H₁₂O₆ + O₂ → CO₂ + H₂O
N₂ + O₂ → NO
H₂O + CO₂ → O₂ + C₂H₆O₁₀
Cellular respiration can be summarized by which equation?
CO₂ + H₂O + light energy → C₆H₁₂O₆+O₂
C₆H₁₂O₆ + O₂ → CO₂ + H₂O + energy
N₂ + H₂ → NH₃
H₂O + sunlight → O₂ + glucose
What is a "carbon sink"?
A type of producer
A reservoir that absorbs more CO2 than it releases
An area of high pollution
A location with no plants
Denitrification is the process of:
Converting nitrogen gas into nitrates
Releasing nitrogen gas back into the atmosphere
Absorbing nitrogen from the soil
Building up nitrogen in plants
What are "nitrogen-fixing bacteria"?
Bacteria that break down organic matter
Bacteria that convert atmospheric nitrogen into a usable form
Bacteria that consume other organisms
Bacteria that live in the soil only
What does "eutrophication" describe?
The process of energy loss in a food web
The buildup of nutrients in water leading to algal blooms
The recycling of carbon in an ecosystem
The decrease in biodiversity
Sustainability refers to:
The ability to maintain ecological balance
The maximum use of resources
The extinction of species
The increase in pollution
