Conservation of Biodiversity
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Deforestation and its Consequences
SubtopicDeforestation and its Consequences under Conservation of Biodiversity for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Deforestation leads to an increase in the level of carbon dioxide () in the atmosphere, which traps heat and results in global warming. According to the flowchart, what is a major consequence of the resulting increase in Earth's temperature?
A.Decrease in the level of sea water
B.Melting of glaciers and polar ice caps
C.Increase in the total forest cover
D.Decrease in the concentration of greenhouse gases
- 2.
Why is the topsoil considered very important for plants?
A.It is hard
B.It contains stones
C.It is rich in humus and nutrients
D.It is very deep
- 3.
What is the relationship between deforestation and soil moisture?
A.Deforestation increases soil moisture
B.Deforestation decreases soil moisture
C.Deforestation does not affect soil moisture
D.Deforestation makes soil underwater
- 4.
Which of the following is a major reason for the destruction of forests in developing countries?
A.Decreasing population
B.Industrialization and urbanization
C.Increase in forest cover
D.Decrease in wood demand
- 5.
Based on the provided diagram, if the forest habitat is completely destroyed due to deforestation, what is the most likely consequence for Species A (an endemic species)?
A.It will successfully migrate to 'Other Ecosystems' along with Species B.
B.It faces a high risk of extinction because its presence is restricted only to that specific forest.
C.It will experience a population explosion due to the lack of competition from Species B.
D.It will undergo rapid physical evolution to survive in the cleared agricultural land.
- 6.
Which of the following is an example of an indirect consequence of deforestation on human health?
A.Increase in breathing problems due to poor air quality
B.Direct injury from falling trees
C.Increase in the number of forest fruits available
D.Improved immunity due to exposure to soil
- 7.
How does deforestation affect the 'flow' of water in rivers?
A.It makes the flow steady and constant.
B.It leads to erratic flow, with high peaks during rain and low levels in dry seasons.
C.It stops the flow of water completely.
D.It makes the water flow faster due to lack of gravity.
- 8.
Which of the following best summarizes the 'Consequences of Deforestation' on a global scale?
A.Local cooling, increased soil fertility, and more oxygen.
B.Global warming, loss of biodiversity, and disruption of the water cycle.
C.Faster rotation of the earth and more land for farming.
D.Increased rainfall and higher groundwater levels.
- 9.
How does the 'Compaction of Soil' after deforestation affect the Nitrogen cycle?
A.It makes Nitrogen easier for plants to absorb.
B.Reduced air spaces in the soil can lead to anaerobic conditions, favoring denitrifying bacteria that turn nitrates back into nitrogen gas.
C.Soil compaction turns nitrogen into solid gold.
D.Nitrogen cycle only happens in the air, not in the soil.
- 10.
What is the 'Extinction Debt' in the context of deforestation?
A.The money a country owes for killing rare animals.
B.The future extinction of species due to past habitat loss that has not yet taken full effect.
C.The number of species that must die to save the forest.
D.A bank account used to fund zoos.
Download the worksheet for Conservation of Biodiversity - Deforestation and its Consequences to practice offline. It includes additional chapter-level practice questions.
Biosphere Reserves, Wildlife Sanctuaries, and National Parks
SubtopicBiosphere Reserves, Wildlife Sanctuaries, and National Parks under Conservation of Biodiversity for Grade 8 CBSE.
Preview questions (no answers)
- 1.
In which zone of the Biosphere Reserve is limited human activity like research and education permitted?
A.Core Zone
B.Buffer Zone
C.Transition Zone
D.Central Zone
- 2.
Dinosaur fossils were found in which of these areas, showing species can become extinct?
A.Satpura National Park
B.Pachmarhi Biosphere Reserve
C.Both A and B
D.None of these
- 3.
The rock paintings in Satpura National Park depict:
A.Modern machines
B.Men fighting, hunting, and dancing
C.Alien spaceships
D.Undersea life
- 4.
If we continue to cut trees at the current rate, what will happen to the groundwater level?
A.It will increase
B.It will remain same
C.It will decrease
D.It will turn into salt water
- 5.
Which of these factors is NOT typically used to define an area as a Biosphere Reserve?
A.Diversity of flora and fauna.
B.The presence of a large urban city center inside the core.
C.The culture of the local tribal people.
D.The presence of specific ecological niches.
- 6.
If a forest area is left undisturbed, it re-establishes itself through which process?
A.Artificial Reforestation
B.Natural Reforestation
C.Deforestation
D.Desertification
- 7.
Wildlife Sanctuaries are set up to provide protection and suitable living conditions to:
A.Tribal people and their culture.
B.Wild animals.
C.Commercial timber plantations.
D.Domesticated farm animals.
- 8.
Satpura National Park is part of the Pachmarhi Biosphere Reserve. Which specific geographical feature is it known for, which helps in the study of early human life?
A.Deep volcanic craters
B.Prehistoric rock shelters and paintings
C.Ancient coral reefs
D.Glacial moraines
- 9.
Why is the preservation of 'Endemic Species' considered a high priority in conservation biology?
A.Because they are found everywhere and are easy to replace.
B.Because they have a very wide range of genetic diversity.
C.Because their restricted range makes them highly susceptible to extinction if their habitat is disturbed.
D.Because they are usually the largest animals in the ecosystem.
- 10.
Which of the following activities is generally allowed in the 'Transition Zone' of a Biosphere Reserve but strictly prohibited in the 'Core Zone'?
A.Cutting of ancient trees for timber
B.Sustainable agriculture and human settlements
C.Hunting of endangered animals for sport
D.Setting up of heavy chemical industries
Download the worksheet for Conservation of Biodiversity - Biosphere Reserves, Wildlife Sanctuaries, and National Parks to practice offline. It includes additional chapter-level practice questions.
Endemic Species and Red Data Book
SubtopicEndemic Species and Red Data Book under Conservation of Biodiversity for Grade 8 CBSE.
Preview questions (no answers)
- 1.
Study the provided flowchart. Based on how the information is organized, which statement correctly describes the structure of the Red Data Book?
A.It combines all threatened organisms into one single alphabetical list.
B.It maintains separate records for plants, animals, and other species.
C.It is exclusively used for tracking animals and excludes plant data.
D.It only keeps records for species that are already completely extinct.
- 2.
What happens when the natural habitat of an endemic species is cleared for a new highway?
A.The species will quickly find a new home in a different country.
B.The species may be pushed toward extinction as its unique home is lost.
C.The species will start eating different food and survive.
D.The species will increase in number because of more sunlight.
- 3.
The Red Data Book helps scientists identify which species are in need of ______.
A.Culling
B.Conservation
C.Exclusion
D.Exporting
- 4.
Endemic species can be restricted to:
A.A small island
B.A specific mountain range
C.A particular state
D.All of the above
- 5.
A species that is no longer found in a particular area but exists elsewhere in the world is said to be 'locally extinct'. If it is not found anywhere on Earth, it is:
A.Endangered
B.Endemic
C.Extinct
D.Vulnerable
- 6.
The presence of 'Sal' and 'Wild Mango' as endemic flora in Pachmarhi helps us understand that:
A.These plants can grow in the desert.
B.These plants are unique to that specific ecosystem.
C.These plants were brought by travelers 100 years ago.
D.These plants are poisonous and cannot be touched.
- 7.
Why are many endemic species found in 'Biodiversity Hotspots'?
A.Hotspots have very few species.
B.Hotspots are areas with high levels of species richness and high endemism.
C.Hotspots are areas where all species are already extinct.
D.Hotspots are areas created by humans to keep invasive species.
- 8.
What is the primary reason that endemic species have restricted geographical ranges?
A.They are too lazy to move to other places.
B.They are physically or ecologically barred from spreading to other areas by barriers like oceans, mountains, or specific climate needs.
C.They have been told by other animals to stay in their own territory.
D.They are afraid of the predators found in other parts of the world.
- 9.
Why is the term 'Biodiversity' closely linked to the Red Data Book?
A.Biodiversity refers to the number of books in a library.
B.The Red Data Book tracks the loss of biodiversity by documenting species at risk of extinction.
C.Biodiversity is the name of the author of the Red Data Book.
D.The Red Data Book only lists species that have zero biodiversity.
- 10.
If you are studying a Red Data Book and see a species marked as 'EW', what should you look for if you want to see a living specimen?
A.A deep, unexplored cave in the rainforest.
B.The bottom of the Mariana Trench.
C.A botanical garden, zoo, or specialized conservation facility.
D.Under a microscope in a pathology lab.
Download the worksheet for Conservation of Biodiversity - Endemic Species and Red Data Book to practice offline. It includes additional chapter-level practice questions.
Migration and Reforestation
SubtopicMigration and Reforestation under Conservation of Biodiversity for Grade 8 CBSE.
Preview questions (no answers)
- 1.
When we save paper, we are indirectly helping to ________.
A.Conserve biodiversity
B.Build more roads
C.Reduce the number of birds
D.Increase desert area
- 2.
Reforestation can lead to an increase in ________ levels.
A.Pollution
B.Precipitation (Rainfall)
C.Temperature
D.Carbon monoxide
- 3.
Which of the following contributes to the reduction of the greenhouse effect?
A.Cutting forests
B.Reforestation
C.Using more paper
D.Industrialization
- 4.
The Siberian crane migrates to India because the winter in Siberia is ________.
A.Too hot
B.Extremely cold
C.Very rainy
D.Very dusty
- 5.
In the context of reforestation, how do 'fruit-eating birds' contribute to the growth of a new forest?
A.By building nests that protect the tree bark
B.By eating the leaves and preventing them from shading the ground
C.By dispersing seeds through their droppings in different areas
D.By chirping, which stimulates the trees to grow faster
- 6.
When studying migration, scientists often use 'bird banding' (placing a small metal ring on a bird's leg). What is the main purpose of this?
A.To help the bird fly more balanced
B.To track the bird's movement and identify its migration route if caught elsewhere
C.To provide the bird with extra minerals through the skin
D.To frighten away predators with the shiny metal
- 7.
Which of the following is an expected outcome of natural reforestation in a tropical region?
A.The soil becomes sandy and dry like a desert
B.The humidity levels in the area increase due to transpiration
C.The local temperature rises significantly
D.Oxygen levels in the local atmosphere decrease
- 8.
What is the primary danger of 'Light Pollution' for migratory songbirds that travel by night?
A.It makes them fly too fast and get tired
B.It causes them to go blind permanently
C.It disorients them, leading to fatal collisions with illuminated buildings
D.It makes them think it is daytime, so they stop to eat in the middle of the air
- 9.
During natural reforestation of a field, why do 'Grasses' usually appear before 'Oak trees'?
A.Because grasses are stronger than oaks
B.Grasses are r-strategists with high dispersal and rapid growth in high-light conditions
C.Oaks need to be planted by humans or they won't grow
D.Grasses eat the nutrients that oaks need
- 10.
The 'Flyway' concept used in international bird conservation refers to:
A.The specific altitude at which a bird flies
B.The entire geographic range used by a migratory species throughout its annual cycle
C.A special path cleared of trees so birds don't crash
D.The speed at which a bird travels during a storm
Download the worksheet for Conservation of Biodiversity - Migration and Reforestation to practice offline. It includes additional chapter-level practice questions.