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WorksheetsThe Biosphere
Total questions: 20
Worksheet time: 11mins
All life on Earth exists in
an ecosystem
a biome
the biosphere
ecology
Which term describes a group of different species that live together in a defined area?
a population
a community
an ecosystem
a biosphere
Which is not a level of organization in the biosphere
Individual
Biome
Ecosystem
Habitat
A dead tree is an example of an abiotic factor.
True
False
Primary producers are organisms that
rely on other organisms for their energy and food supply
consume plant and animal remains and other dead matter
use energy they take in from the environment to convert inorganic molecules into complex organic molecules
obtain energy by eating only plants
Which of the following organisms is a decomposer?
a fox
bacteria
holly
mountain blue jay
Chemosynthesis is when organisms use heat or chemical energy to combine inorganic molecules in complex organic molecules.
True
False
The series of steps in which a large fish eats a small fish that has eaten algae is a
food web
food chain
pyramid of numbers
pyramid of biomass
The total amount of living tissue at each trophic level in an ecosystem can be shown in a(n)
energy pyramid
pyramid of numbers
biomass pyramid
biogeochemical cycle
Which group of organisms is always found at the base of a food chain or food web?
primary producers
primary consumers
secondary consumers
detrivores
Nutrients move through an ecosystem in
biogeochemical cycles
water cycles
energy pyramids
ecological pyramids
Which biogeochemical cycle does NOT include a major path in which the substance cycles through the atmosphere?
water cycle
carbon cycle
nitrogen cycle
phosphorus cycle
A group of individuals that belong to a single species and that live together in a defines area is termed a(n)
population
ecosystem
community
biome
Which of the following is NOT true about matter in a biosphere?
Matter is recycled in the biosphere
Biogeochemical cycles transform and reuse molecules
The total amount of matter decreases over time
Water and nutrients pass between organisms and the environment.
Which is a source of energy for Earth's living things?
wind energy only
sunlight only
wind energy and sunlight
sunlight and chemical energy
Which of the following is a primary producer?
algae
a lion
a human
an earthworm
Human activities, such as the burning of fossil fuels, move carbon through the carbon cycle. Which other processes also participate in the carbon cycle?
biological processes only
geochemical processes only
chemical processes only
a combination of biological, geological, and chemical processes
What are the physical, or nonliving components of an ecosystem called?
abiotic factors
temperature conditions
biotic factors
antibiotic factors
What can you conclude about the ecosystem from the pyramid of numbers shown on the left?
There are more first-level consumers than producers
There are more third-level consumers than second-level
There are more producers that first-level consumers
There are more second-level consumers than first-level consumers
What can you conclude about the producers in the ecosystem based on the two pyramids shown?
The producers in the ecosystem are probably very small organisms
There are no producers in the ecosystem
The producers in the ecosystem are probably large organisms
Decomposers in the ecosystem outnumber the producers in the ecosystem
