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WorksheetsFood Chain (The Cases) and Food Web
Total questions: 10
Worksheet time: 10mins
Grand Canyon in one of the habitat of Deer in the past, however nowadays they already gone because of they lose their natural predator. What is the relation between losing their natural predator to their existence in Grand Canyon?
Their natural predator help them to maintain the number of their food which is the grass by keep them save from other herbivores so the deer can have enough food supply.
Without their natural predator, the deer don't have any reason to produce offspring (new generation), this is lead them to their extinction.
Because there is no predator in the nature, they become over populated and make their food supply run out too fast that lead them to starve and die.
The natural predator loss makes the deer start too eat each other. This is causing they loss too many members in no time and start to become endangered and then extinct.
Rabbits are ever be a big problem for a farmer in Australia. They make the farmers suffer of loss of their live stock supplies. What does the rabbit do to the farmers live stock such sheep and cow that time?
The rabbit eats all the farmers live stocks so there is no left behind anymore.
The rabbit gives out poisons to the farmers live stocks, so all of them get poisoned and die.
The rabbit become overpopulated and eats all the grass that become food for the live stocks.
The rabbit become overpopulated and fight to the death with the live stocks and they win it.
Thylacine is one of the animal that got extinct because of human activities. What do we do to the Thylacine so they become extinct?
Over hunting because human thinks that Thylacine can eat them too.
Over hunting because human thinks that Thylacine is a predator that kill their kids.
Over hunting because human thinks that Thylacine can produce poison that can harm human.
Over hunting because human thinks Thylacine kills and eats their live stocks.
Why does dodo bird become extinct?
Because they don't have any natural predators so they become over populated and loss their food faster than it should be.
Human bring dog and they eat all of the dodo birds in the island and leads them to their extinction.
Dodo bird doesn't have any alarm warning in their instinct yet, so they are not afraid when they meet human or their predator and makes the easy to catch.
Dodo bird doesn't have a good instinct to stay away from dangerous situation such as eruption so all them die when the biggest mountain in the island erupts.
DDT is a type of insecticide that used in Borneo to kill mosquitos who spread Malariae (type of fever). Instead of killing mosquitos this insecticide also help the Dayak tribe that time by ________________
kill the insects that harm their crops so they can have more supplies for them.
kill the insect that eat their straw roofs in this case they are the caterpillars.
kill the predators such us tiger that can harm them, so they can survive live in the middle of the forest.
kill the caterpillars who eat their crops so they can have more supplies for them.
Dayak tribe are free from Malariae because of DDT, however they got Typhus after that. Why does this thing happens?
DDT is bio accumulator that in the of the end of the day kill the snake that become the natural predator of rat who spread typhus through their pee.
DDT poisoned several living things and this thing leads to the death of cat as the natural predator of rat who spread typhus through their pee.
DDT is a bio accumulator in this case they can poison all of the living things excepts rats, that is why the rats become over populated and spread the Typhus easily.
DDT poisoned several living things and this thing leads to the death of the rat. As the revenge the rats population grow faster and spread the Typhus disease to the human.
The food chain that happens during the DDT breaks in Borneo is ___________ and this food chain that makes the cats die.
straw roof --> caterpillar --> cat --> gecko --> cat
straw roof --> caterpillar --> cat --> wasp --> gecko
straw roof --> caterpillar --> gecko --> wasp --> cat
straw roof --> caterpillar --> wasp --> gecko --> cat
What will happen if the number of the phyton decrease in this food web?
the number of hawk will increase
the number of butterfly will decrease
the number of rat will decrease
the number of frog will stay same
If the number of the dragonfly decrease, it could be happen if the number of _____________ is also decrease
frog
hawk
thrush
tulip
What will happens to the number of hawk if the number of vole is decrease?
increase
decrease
stay the same
all of the answers are wrong
