Worksheetsgrade 5 Final Exam Revision
Total questions: 50
Worksheet time: 25mins
Movement of water from Earth’s surface to the air and back again is called the …………………
water cycle
oxygen cycle
carbon cycle
When all parts in an ecosystem are in balance,that means it is a ………… ecosystem.
healthy
balance
unhealthy
What is most abundant gas in the air?
Nitrogen
oxygen
water vapor
Which of these factors will affect the population in the ecosystem?
predators
food,space
food,space and predators
Movement of nitrogen from the soil to living things then back to air is called the …………………..
nitrogen cycle
oxygen cycle
carbon cycle
Which statement is accurate?
Living things take nitrogen directly from air.
When living things die,producers break down their remains
Living things can only use nitrogen if it is combined with other elements into compounds.
Complete the sentence: A healthy ecosystem……..
has very few species in it.
is out of balance
has all its parts in balance
How does lightning help in nitrogen cycle?
It burns the nitrogen in the air
It changes nitrogen gas to nitrogen compound
Both A and B
Which of these statements supports the process of evaporation in the water cycle?
Plants release water from the leaves.
Precipitation falls to the ground in various form.
Water vapor in the air is changed.
How does matter move through an ecosystem?
matter moves from one organism to another through a cycle
matter moves through an ecosystem from the atmosphere to the land
matter does not move in an ecosystem
What is an healthy ecosystem?
It is an ecosystem where there is a balance between the predators and prey
It is an ecosystem where there is balance between and among the biotic and abiotic compounds
Both A and B
Introducing new species to an ecosystem can change its balance.
True
False
Matter and energy do not move an ecosystem.
True
False
Nitrogen in the air can be use by plants and animals.
True
False
If there is plenty of food in an ecosystem,population move on or die out.
True
False
Carbon is returned to soil by the decomposer.
True
False
Animals take in carbon dioxide and release oxygen.
True
False
Evaporation:Liquid to gas; …………………….. : gas to liquid
condensation
precipitation
transpiration
A forest fire burns a patch of wilderness and plants begins to grow there afterward.
Primary succession
Secondary succession
Both A and B
……………………. : Photosynthesis; carbon dioxide:respiration
oxygen
nitrogen
water vapor
A land slide covers a forest and plans begins to grow on the soil.
Primary succession
Secondary succession
Both A and B
…………………….. : plants; oxygen:animal
carbon dioxide
nitrogen
water vapor
A volcano erupts and creates new land,which begins to break down to make soil.
Primary succession
Secondary succession
Both A and B
Hawk : ……………… Mouse : Prey
consumer
decomposer
predator
plants : producer : bacteria : ……………………..
carnivores
consumers
decomposer
Which of these organisms is considered to be pioneer?
Mosses
Mouse
Small plants
Is a change that happens in a new area where no soil or organisms exist.
Primary Succession
Secondary Succession
The first organisms that appear in a new ecosystem are called __________________.
Pioneers
Starter
Plants
Is a change that happens when an ecosystem is disturbed, but the soil is still present.
Primary Succession
Secondary Succession
Changes in an environment can be helpful only.
True
False
The gradual change of organisms in an ecosystem is called _____________.
Succession
Environment
Ecosystem
Is the way to preserve the environment.
Conservation
Preserve
Keeping
Organisms that are at risk of dying out are called ________________.
Extinction
Endangered Species
Conservation
Oxygen is released during photosynthesis.
True
False
Carbon dioxide is released during photosynthesis.
True
False
Animals take in carbon dioxide and release oxygen.
True
False
Oxygen is used and carbon dioxide is released in burning processes.
True
False
A volcano erupts and creates new land, which begins to break down to make soil.
Primary succession
Secondary succession
A landslide covers a forest and plants begins to grow on the soil.
Primary succession
Secondary succession
Pandas and Bears are not endangered.
True
False
Decomposers break down dead organisms.
helpful
harmful
A new species comes to an area and eats all the plants.
helpful
harmful
All the predators in an ecosystem die suddenly.
helpful
harmful
What is the difference between primary and secondary succession?
Primary succession occurs after disturbance in an ecosystem, and secondary succession occurs where there is no ecosystem yet.
Primary succession occurs when animals go extinct, and secondary succession occurs conserves animals.
Primary succession occurs where there is no ecosystem yet, and secondary succession occurs after disturbance in an ecosystem.
When the balance of an ecosystem is disturbed, it can lead to some species' extinction.
True
False
When the balance of an ecosystem is disturbed, it can endanger some animals.
True
False
Cats are an extinct species.
True
False
Removing decomposers from an ecosystem helps to keep it in balance.
True
False
Name three human activities that cause changes to the environment.
Farming, mining, and pollution
Tornado, hurricane, and deforestation
Once an organism is extinct, it will come back again in the future.
True
False
