WorksheetsEcology System
Total questions: 20
Worksheet time: 10mins
Which of the following is an example of a producer?
Lion
Oak Tree
Mushroom
Wolf
What happens during bioaccumulation?
Toxins break down easily in the environment.
Toxins become diluted in food chains.
Toxins increase in concentration as they move up the food chain.
Toxins are only found in decomposers.
What process removes carbon dioxide from the atmosphere?
Cellular respiration
Combustion
Photosynthesis
Decomposition
Which of the following is NOT a step in the water cycle?
Evaporation
Transpiration
Nitrogen Fixation
Precipitation
In the nitrogen cycle, what organism converts nitrogen gas into a form plants can use?
Fungi
Bacteria
Insects
Birds
Which of the following processes removes carbon from the atmosphere?
Combustion
Photosynthesis
Cellular Respiration
Decomposition
What is the main source of energy for ecosystems?
Wind
Water
The Sun
Soil Nutrients
Which process increases nitrogen availability for plants?
Denitrification
Photosynthesis
Nitrogen Fixation
Cellular Respiration
Which organisms are responsible for decomposing organic matter?
Herbivores
Carnivores
Bacteria and Fungi
Producers
Why is the water cycle important?
It transports nutrients
It regulates Earth’s temperature
It sustains life
All of the above
What type of organism is found at the base of every food chain?
Carnivores
Decomposers
Producers
Omnivores
What is the role of decomposers in an ecosystem?
They consume primary producers
They recycle nutrients by breaking down dead matter
They absorb sunlight for photosynthesis
They compete with herbivores for food
What is an example of a density-independent factor affecting population size?
Disease
Competition for food
Forest fires
Predation
What is bioamplification?
The breakdown of toxins in an ecosystem
The increase in concentration of toxins at higher trophic levels
The recycling of nutrients in an ecosystem
The absorption of carbon dioxide by plants
What is the primary purpose of photosynthesis?
To produce oxygen
To break down glucose
To convert sunlight into chemical energy
To absorb nitrogen from the air
Which of the following is an example of a keystone species?
Rabbit
Beaver
Grasshopper
Oak tree
How does eutrophication affect aquatic ecosystems?
It increases fish populations
It depletes oxygen levels in the water
It makes the water clearer
It reduces plant growth
What is an invasive species?
A species that is naturally found in an ecosystem
A non-native species that negatively impacts an ecosystem
A species that helps maintain biodiversity
A species that only eats plants
What happens to the amount of energy as it moves up the food chain?
It increases
It remains the same
It decreases
It is completely lost
Why is biodiversity important to an ecosystem?
It increases the stability of ecosystems
It decreases food availability
It makes ecosystems more vulnerable to disturbances
It reduces the number of species in an area
