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WorksheetsEnergy & Nutrients
Total questions: 21
Worksheet time: 11mins
During the carbon cycle, which of the following carbon compounds would be utilized as an energy source by heterotrophs?
Organic Molecules
Carbon Dioxide
Carbon Monoxide
Carbonic Acid
Which of the following is true about secondary consumers in an ecosystem?
They eat only plants
They are fewer in number than are primary consumers
They contain the greatest total biomes in the system
They are eaten by primary consumers
In the nitrogen cycle, the transformation of gaseous nitrogen into nitrogen-containing compounds is performed primarily by
Fungi
Green Plants
Herbivores
Bacteria
The organic and inorganic materials in organisms in an ecosystem will eventually be returned to the environment by the action of
Producers
Apex Predators
Secondary Consumers
Decomposers
Which of the following best explains why there are seldom more than five trophic levels in a food chain?
Energy is lost from each trophic level
Trophic levels above this number contain too many individuals
Most carnivores function at more than one trophic level
The ecosystem contains too much biomass
Carbon from the nonliving environment becomes a part of living organisms through
Photosynthesis
Absorption
Respiration
Transpiration
Carbon dioxide and water are released as byproducts of
Decomposition
Photosynthesis
Combustion
Respiration
Most animals get the nitrogen they need by
Eating other organisms
Drinking water
Breathing
"Fixing" nitrogen
Bacteria are essential to
Combustion
Nitrogen fixation
Photosynthesis
Evaporation
Approximately 78 percent of the Earth's atmosphere is nitrogen gas. How do we get this nitrogen from the atmosphere to use for building proteins?
By eating plants
Both by eating animals and their products and by eating plants
By breathing air
By eating animals or their products
A community is several species of animals interacting, while a population is
A single organism
Members of one species in an area
Non-living parts of a habitat
Biotic and abiotic factors in an area
The ecological levels of organization, from least inclusive to most inclusive are
Biome,organism, population, biosphere, ecosystem, community
Biosphere, biome, ecosystem, community, population, organism
Organism, population, biome, biotic elements, abiotic factors, community
Organism, population, community, ecosystem, biome, biosphere
Which of the following is abiotic?
An alligator
A dead parrot
Grass
Water
One food web arrow goes from a prairie dog to a coyote, showing that
The coyote is the producer in this relationship
The coyote is bigger
The coyote eats the prairie dog
The prairie dog eats the coyote
Rocks temperature and water are what part of the environment?
Biotic
Population
Living
Abiotic
What do several different populations living together make?
Biosphere
A biome
An organism
A community
In a food web, arrows point in just one direction because they show
How energy goes to the animal that is eating
Which animal is bigger
How energy goes to the animal that is eaten
Which animals are related
The plants a ladybug lives on, the aphids the ladybug eats, and the birds that would eat the ladybug are all
Abiotic parts of the ecosystem
Biotic elements of an ecosystem
Predators
Producers
Herbivores, carnivores and omnivores are all
Decomposers
Consumers
Producers
Predators
What word describes a community of organisms and their environment?
Individuals
Population
Ecosystem
Community
Bears eat fruits such as berries and animals such as fish. They hibernate in the winter. They give birth to live young. Which of these terms applies to bears?
They have a mutualistic relationship with berries
They are decomposers
They are at the bottom of the energy pyramid
They are consumers
