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Worksheetsgrade 5 , con 3
Total questions: 25
Worksheet time: 13mins
The Sun provides the Earth with
light only
warm only
light and warm.
light and sound
On extreme hot climate, the water of a lake
increases due to evaporation.
decreases due to evaporation.
changes into ice.
has a lower temperature.
All the following factors pollute the water, except
sunlight.
animals wastes.
human wastes
plastic garbage.
All the following are affected by water pollution, except
the soil
the Sun.
the animals.
the plants
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 increase
producers decreases
decomposers 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
If there is a tertiary consumer in a food chain, this means that there is
a primary consumer only.
a secondary consumer only.
a primary and a secondary consumers.
neither primary nor secondary consumers.
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.
Leakage of oil into seawater negatively affects the
desert organisms
marine organisms
forest organisms
rivers organisms
Fire in forest produces
smoke only.
ash only
smoke and ash
oxygen and ash
Pollutants produced from a forest fire harm all the following, except
air.
respiratory system
grasses
sunlight
As a result of pollution in an ecosystem, the number of living organisms
decreases
increases.
doesn't change
is doubled.
Any increase or decrease in the number of organisms of one type of species is known as
an ecosystem.
adaptation
a climate change.
a population change
If the climate change is suitable, the population of a species
will die
will not be affected
will increase
will decrease
Healthy marine environment is important for survival of
humans.
lions.
fish
deers.
All the following are healthy resources for marine food webs, except
clean water and food.
clean food and shelter
clean shelter and water
polluted water, food and shelter.
All the following may occur due to habitat loss, except..........
increasing of population.
decreasing of population
extinction of some organisms
decreasing of resources.
When water temperature increases, algae leave tissues of..........so they become bleached.
seabirds
coral reefs
clam
sharks
Coral reefs are considered as resources of.....
food only
shelter only
food and shelter.
food and pollution.
Algae in coral reefs provide food for........directly
primary consumers
secondary consumers
producers
top predators
Coral reefs bleaching negatively affects..........directly
parrotfish only
triggerfish only
butterflyfish and shark
parrotfish and triggerfish
All marine living organisms in seas and oceans form
many food webs
one food chain only
two separated food chains only
three separated food chains only
..... are living organisms that are negatively affected by pollution of marine ecosystem
Whales and lions
Sharks and tigers
Elephants and deers
Algae and fish
Which of the following two living organisms don't have direct food relationship between them?
Parrotfish and shark
Butterflyfish and shark
Triggerfish and shark.
Eagle and shark.
