Class 8 Science Chapter 5 Practice Question Answers - Conservation of Plants and Animals

Q1: What is sanctuary?
Ans: An area where animals are protected from any disturbance to them and their habitat is called a sanctuary.

Q2: Name the major threat to the survival of organism.
Ans: Deforestation

Q3: Write the names of some parks and sanctuaries.
Ans: Dudhwa National Park, Bharatpur Bird Sanctuary, Kaziranga National Park, Nelapattu Bird Sanctuary, etc.

Q4: Write two natural causes of deforestation.
Ans:

• Severe droughts
• Forest fires

Q5: Give examples of flora.
Ans: Teak, sal, mango, jamun, arjun, etc.

Q6: Give examples of fauna.
Ans: Elephant, tiger, wild bear, etc.

Q7: Name two endemic fauna.
Ans: Giant squirrel, bison

Q8: Name some forest products.
Ans: Paper, wood, timber, vegetables, fruits, rubber, etc.

Q9: _________ is an endemic flora of the Pachmarhi Biosphere Reserve.
Ans: Wild mango

Q10: _________ is a group of population which are capable of interbreeding.
Ans: Species

Q11:  _________ is also a place where animals receive protection.
Ans: Zoo

Q12: _________ is the first Reserve Forest of India.
Ans: Satpura National Park

Q13: _________ was launched by the government to protect the tigers in India.
Ans: Project Tiger

Q14: An increase in the amount of carbon dioxide results in
(a) winter season
(b) global warming
(c) rainfall
(d) all of these
Ans: (b)
Explanation: An increase in the amount of carbon dioxide (CO₂) in the atmosphere is one of the major contributors to global warming. Carbon dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, leading to a gradual increase in the planet's average temperature, which is known as global warming. This warming has a range of impacts, including changes in weather patterns, melting ice, and rising sea levels.

Q15: The reduction in rainfall could cause
(a) droughts
(b) cold
(c) greenery
(d) none of these
Ans: (a)
Explanation: A reduction in rainfall leads to decreased water availability, which can result in droughts. Droughts are periods of abnormally low precipitation that can have significant negative impacts on water resources, agriculture, ecosystems, and human activities in affected regions.

Q16: The removal of top layer of soil leads to
(a) desertification
(b) rainfall
(c) snowfall
(d) deforestation
Ans: (a)
Explanation: The removal of the top layer of soil, often through processes like erosion and deforestation, can lead to desertification. Desertification is the process by which fertile land becomes increasingly arid and desert-like due to factors like loss of vegetation cover and soil degradation.

Q17: Name the sphere that supports life, and where living organisms exist.
(a) Atmosphere
(b) Lithosphere
(c) Biosphere
(d) None of these
Ans: (c)
Explanation: The biosphere refers to the portion of Earth's surface and atmosphere that supports life. It includes all living organisms, their interactions, and their environments. The biosphere encompasses the various ecosystems on land, in water, and in the air, where organisms exist and interact.

Q18: The variety of organisms living on the earth, is referred to as
(a) biodiversity
(b) food chain
(c) lithosphere
(d) relationship
Ans: (a)
Explanation: Biodiversity refers to the variety and variability of life forms on Earth. It includes the diversity of species, their genetic variations, and the different ecosystems and habitats they inhabit. Biodiversity is crucial for maintaining the health and stability of ecosystems and for providing various ecosystem services that support human well-being.

Value-Based Questions

Q19: Many people in world find it status symbol of wearing and keeping leather clothes and leather articles with them. Even Shahtoosh shawls made of an endangered species of antelope are also in greater demand and highly priced.

1. Do you think we must use leather items for just show off?
2. What is endangered species?
3. Can you name an extinct species which was exploited for its meat?
4. What values of people are shown in above paragraph?

Ans:

1. No
2. A species which is at higher risk of getting extinct is known as endangered species.
3. Dodo
4. They are class conscious, selfish, irresponsible to nature, cruel, etc.

Q20: For centuries human activities such as hunting and encroachment have led to degradation of forests and extinction of many species of plants and animals. Government of India has taken many steps to conserve forests and wildlife. But this movement will not be a success without the involvement of all of us.

1. What products are obtained from forests and wildlife?
2. How can we help in conserving forest and wildlife?
3. Can you name some organisation which are working against killing or poaching of animals?
4. What values of human are shown here towards nature?

Ans: 1. From forests: Wood for fire, timber, furniture, medicines, forage for livestock, gums, raisins, pa-pers, etc. From wildlife: Horns, skin, leather, fur, ivory, meat, fin, etc.
2.

• By saying ‘No’ to animal products we can at least reduce their hunting and poaching.
• By not cutting the trees and planting more saplings we can help in restoring the natural habitat of wild animals.
• By creating awareness among people about importance of forests and wildlife.

3. World Wide Fund for Nature (WWF), International Fund for Animal Welfare (IFAW), World Soci-ety for the Protection of Animals (WSPA), etc.
4. They are cruel, money-minded, selfish, reckless, etc.