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WorksheetsKS3 Science - Ecosystems
Total questions: 10
Worksheet time: 5mins
Organisms living in hot, dry areas are more likely to survive if they:
wash regularly
do not waste water
have thick hair
do not have sharp claws
An ecosystem is:
plumbing and wiring in a house that uses less water and energy than older systems
all the different physical environmental factors that affect a habitat
all the different types of organisms in a habitat
All the organisms in a habitat together with the physical environmental factors.
1 At a certain lake, the community is smaller in winter because:
some of each species of animal have died
some species of birds have migrated
more animals have arrived for the winter so that they can keep warm together
there is more ice on the lake and so less room for the organisms.
What do lizards eat?
mice
grasshoppers
hawks
grass
What might happen if all the rabbits died?
There would be more hawks because there are fewer rabbits in competition with them.
There would be fewer lizards because the hawks would eat more of them.
There would be less grass because the grasshoppers would eat it.
There would be more snakes because they would not compete with the rabbits.
The arrows in a food chain show:
the flow of energy
the loss of energy
how animals use energy to move around in a habitat
how plants make their own energy.
Which of the following food chains does the pyramid of numbers represent?
grass rabbit fox
grass sheep fox
lettuce slug thrush hawk
oak tree caterpillar bird
Using the food web, choose the organisms in the correct order.
microscopic plants > water fleas > small fish > perch
microscope plants > perch > water flease > small fish
perch > waterboatmen > small fish > tadpoles
microscopic plants > tadpoles > water boatman > perch
What word describes the movement of many animals from one part of the world to another?
hibernation
changing
tourism
migration
What is the type of variation shown in the bar chart?
continuous
discontinuous
identical
incomplete
