Font size
Worksheetsecological pyramids
Total questions: 16
Worksheet time: 10mins
ecological pyramids are drawn as ___________ with ______________.
(a)
what are trophic levels?
the position of an organism in a food chain or food pyramid
a term used in relation to the average weather in an area.
the energy levels in an ecosystem
a diagram showing the number of organisms present in each level of food chain.
what forms the first trophic level in an ecosystem?
primary consumers
tertiary consumers
producers
what do food chains and webs show?
the flow of materials and energy in a habitat.
the number of organisms living in a habitat.
what every organism consumes in a habitat.
the relationship between organisms in an ecosystem
what can't be shown from food chains and/or food webs?
what eats what in an ecosystem.
the number of organisms living in a habitat.
bar charts with bars stacked up on top of each other.
what is a pyramid of numbers?
(a)
in which case would a pyramid of numbers be inverted?
when there is a single large producer.
they are always drawn inverted.
when there are a large number of parasites feeding on relatively larger animals.
there is no particular reason.
an example of a case when a pyramid of numbers would invert would be:
a large bird eating a caterpillar.
a small snake eating a mouse.
a large mouse eating cheese.
a group of caterpillars feeding in one big tree.
a pyramid of numbers has a definite shape and cannot vary.
true
false
what is biomass?
(a)
how do you find the biomass of an area?
(a)
pyramid of biomass has definite shape and does not vary.
true
false
what is the relation between biomass and trophic level?
biomass is directly proportional to trophic level.
biomass is inversely proportional to trophic level.
what is a pyramid of biomass?
a diagram showing the total weight of organisms at each level of a food chain.
a diagram showing the total weight of the dry organisms at each level of a food chain.
a diagram showing where each organism belongs in a food chain.
why does pyramid of biomass always have a definite shape?
(a)
what is a pyramid of energy?
(a)
