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Worksheetsgrade 5 , con 3 , leeeon 1 &2
Total questions: 12
Worksheet time: 6mins
If the amount of grasses increases in an ecosystem, this directly increases the number of
caracals.
hawks.
rabbits.
lions.
When the number of the amount of grasses in an ecosystem increases
producers decreases
primary consumers increases
secondary consumers increases
Overfishing and throwing plastic garbage in the sea affect the survival of directly.
desert organisms
marine organisms
rainforest organisms
redents
All the following are human activities that affect a marine ecosystem, except
flooding.
throwing human wastes.
overfishing.
throwing plastic garbage.
All the following are top predators, except
hawks.
tigers.
butterflyfish.
The marine food web usually started with
clam.
zooplankton.
dalgae.
parrotfish
Decomposers play an important role in returning the energy back to all the following, except
the air.
the soil.
the water.
the decomposer.
The secondary consumer is considered as
a prey for primary and tertiary consumers.
a predator for primary and tertiary consumers.
a prey for primary consumer.
a prey for tertiary consumer.
In a food chain, the energy transfer
from a predator to a prey.
from a prey to a predator.
from a predator to a producer.
from a consumer to a producer.
The amount of energy that transfers between living organisms in a food web, is
10%
90%
30%
100%
If all grasses were removed completely from an ecosystem, rabbits in this ecosystem will
increase.
decrease.
die
not be affected.
It is better for a predator in a food web, to have
only one type of decomposers
more than one type of decomposers.
only one type of prey.
more than one type of prey.
