IGCSE Environmental Management Unit
9 Questions and answers
Ecosystem - correct answer-A biological community of interacting organisms and their
physical environment.
Population - correct answer-A group of individuals that belong to the same species and live
in the same area
Community - correct answer-a group of populations of different species that live together in
an area and interact with each other.
habitat - correct answer-the place within an ecosystem where an organism lives.
Niche - correct answer-the role of a species within the ecosystem
food web - correct answer-: a diagram showing the relationship between all (or most) of the
producers, primary, secondary and tertiary consumers in an ecosystem.
food chain - correct answer-a diagram showing the relationship between a single producer
and primary, secondary and tertiary consumers
trophic level - correct answer-step in a food chain or food web
pyramid of numbers - correct answer-a diagram that represents the number of organisms at
each trophic level in an ecosystem by a horizontal bar whose length is proportional to the
numbers at that level.
Producers - correct answer-organisms within an ecosystem that can carry out
photosynthesis.
Primary consumers - correct answer-organisms within an ecosystem that derive their food
from producers.
secondary consumer - correct answer-organisms within an ecosystem that derive their food
from primary consumers.
Tertiary consumers - correct answer-organisms within an ecosystem that derive their food
from secondary consumers.
Decomposers - correct answer-organisms within an ecosystem that derive their food from
the bodies of dead organisms.
abiotic factors - correct answer-Nonliving components of environment.
9 Questions and answers
Ecosystem - correct answer-A biological community of interacting organisms and their
physical environment.
Population - correct answer-A group of individuals that belong to the same species and live
in the same area
Community - correct answer-a group of populations of different species that live together in
an area and interact with each other.
habitat - correct answer-the place within an ecosystem where an organism lives.
Niche - correct answer-the role of a species within the ecosystem
food web - correct answer-: a diagram showing the relationship between all (or most) of the
producers, primary, secondary and tertiary consumers in an ecosystem.
food chain - correct answer-a diagram showing the relationship between a single producer
and primary, secondary and tertiary consumers
trophic level - correct answer-step in a food chain or food web
pyramid of numbers - correct answer-a diagram that represents the number of organisms at
each trophic level in an ecosystem by a horizontal bar whose length is proportional to the
numbers at that level.
Producers - correct answer-organisms within an ecosystem that can carry out
photosynthesis.
Primary consumers - correct answer-organisms within an ecosystem that derive their food
from producers.
secondary consumer - correct answer-organisms within an ecosystem that derive their food
from primary consumers.
Tertiary consumers - correct answer-organisms within an ecosystem that derive their food
from secondary consumers.
Decomposers - correct answer-organisms within an ecosystem that derive their food from
the bodies of dead organisms.
abiotic factors - correct answer-Nonliving components of environment.
