Welcome to CBSE Class 8 Science Chapter Conservation of Plants and Animals,

🎯 Chapter Learning Objectives

you will confidently understand:

• 🔬 Biodiversity, ecosystems, and why they matter

• 🪵 Deforestation – causes, consequences, and solutions

• 🌿 Flora, fauna, endemic species, Red Data Book (definitions + examples)

• 🛡️ Wildlife sanctuaries, national parks, biosphere reserves (comparison table)

• ♻️ Reforestation, afforestation, paper recycling (practical solutions)

• ✏️ 50+ exam questions – MCQs, short answers, long answers with detailed solutions

🌿 1. What is Conservation of Plants & Animals?

Conservation means protecting and wisely using plants, animals, forests, and natural resources so future generations can enjoy them too.

Earth’s biodiversity includes 8.7 million species – plants, animals, insects, birds, fish, and microbes living together in ecosystems (forests, rivers, deserts, oceans).

Why conserve?
🌬️ Trees give oxygen and clean air
💧 Forests store water and prevent floods
🦋 Animals control pests and pollinate crops
🌍 Healthy ecosystems = stable climate

Example: If bees disappear (due to pesticides), crops won’t grow → food crisis worldwide.

🪵 2. Deforestation – The Silent Killer (Most Important Topic)

Deforestation = large-scale cutting/removal of forests, converting forest land into farms, cities, or barren land.

📊 Causes of Deforestation

1. 🌡️ Global Warming – Trees absorb CO₂. Fewer trees = more CO₂ → temperature rise

2. 🌧️ Rainfall Reduction – Trees release water vapor → less rain, droughts

3. 🏜️ Soil Erosion – Roots hold soil → landslides, desertification

4. 🦁 Habitat Loss – Animals lose homes → extinction risk

5. 🌊 Floods – No trees = fast water flow → river flooding

6. 💧 Water Crisis – Forests recharge groundwater → dry wells

7. 🩺 Less Medicine – 25% drugs from plants → future health crisis

8. 💸 Economic Loss – Tourism, timber industries collapse

Real Data: India lost 2.33 million hectares of forest (1990-2020). Amazon loses 11% of its rainforest every decade!

🌿 3. Important Terms

Memory Trick: “FRED” – Flora, Red Data Book, Endemic, Deforestation!

🛡️ 4. Protected Areas

India has:
🌿 89 National Parks
🦁 492 Wildlife Sanctuaries
🌍 18 Biosphere Reserves

Famous Examples:

• Jim Corbett → Tigers

• Ranthambore → Tigers

• Periyar → Elephants

• Manas → Golden langur (endemic)

♻️ 5. Solutions to Save Forests

🌱 Reforestation vs Afforestation

1. Collect old newspapers, notebooks

2. Sort by quality (white, colored)

3. Shred into pulp with water

4. Clean chemicals to remove ink

5. Press into thin sheets

6. Dry → new paper ready!

Benefits: 1 tree = 40,000 pages → Recycling saves 17 trees per ton!

⚡ Quick Revision (25 One-Line Points – Exam Ready)

1. Conservation = protecting plants, animals, and ecosystems

2. Biodiversity = variety of life forms in an area

3. Deforestation = large-scale forest removal

4. 5 main causes: agriculture, logging, infrastructure, fuelwood, mining

5. Global warming due to excess CO₂ from deforestation

6. Flora = plants of a region

7. Fauna = animals of a region

8. Endemic = species found only in one place

9. Red Data Book = endangered species list

10. Wildlife sanctuary → mainly animals, tourism allowed

11. National park → flora+fauna, strict protection

12. Biosphere reserve → biodiversity + human life balance

13. Reforestation = replanting cut forests

14. Afforestation = planting trees on barren land

15. Paper recycling saves 17 trees per ton

16. Gir Forest → Asiatic lions

17. Kaziranga → one-horned rhino

18. Sundarbans → Royal Bengal tiger

19. Soil erosion major deforestation effect

20. Floods + droughts due to deforestation

21. Van Mahotsav = tree planting festival

22. Western Ghats = biodiversity hotspot

23. IUCN publishes Red Data Book

24. The Wildlife Protection Act 1972 protects animals

25. Every tree counts – plant today! 🌳

📝 WORKSHEET (50 Questions with Answers)

🟦 Part A: MCQs (10 Questions)

A1. Large-scale removal of forest is called:
a) Afforestation b) Deforestation c) Reforestation d) Conservation
✅ Answer: b) Deforestation

A2. Plants of a particular region are called:
a) Fauna b) Flora c) Species d) Endemic
✅ Answer: b) Flora

A3. Which is NOT a cause of deforestation?
a) Agriculture b) Mining c) Paper recycling d) Logging
✅ Answer: c) Paper recycling

A4. Red Data Book records:
a) All animals b) Endangered species c) Forests d) Plants only
✅ Answer: b) Endangered species

A5. National Parks protect:
a) Both flora+fauna b) Only animals c) Only plants d) Humans
✅ Answer: a) Both flora+fauna

A6. Ranthambore is famous for:
a) Lions b) Rhinos c) Tigers d) Elephants
✅ Answer: c) Tigers

A7. Planting trees on barren land =
a) Reforestation b) Afforestation c) Deforestation d) Conservation
✅ Answer: b) Afforestation

A8. Which is endemic to the Western Ghats?
a) Tiger b) Lion-tailed macaque c) Elephant d) Peacock
✅ Answer: b) Lion-tailed macaque

A9. Wildlife corridor connects:
a) Two forests b) Cities c) Rivers d) Farms
✅ Answer: a) Two forests

A10. 1 ton of paper recycling saves:
a) 5 trees b) 10 trees c) 17 trees d) 50 trees
✅ Answer: c) 17 trees

🟨 Part B: Fill in Blanks (10 Questions)

B1. Variety of plants and animals in an area is called ______
✅ Answer: biodiversity

B2. Large scale cutting of trees is ______
✅ Answer: deforestation

B3. Animals of a region are called _____
✅ Answer: fauna

B4. _____ are found only in one particular area.
✅ Answer: Endemic species

B5. ______contains list of endangered species.
✅ Answer: Red Data Book

B6. ______National Park is famous for the one-horned rhinoceros.
✅ Answer: Kaziranga

B7. Planting trees where forest existed before is _______
✅ Answer: reforestation

B8. ______is a major consequence of deforestation.
✅ Answer: Soil erosion

B9. ______ is tree planting festival in July.
✅ Answer: Van Mahotsav

B10. ______publishes Red Data Book.
✅ Answer: IUCN

🟥 Part C: True/False (10 Questions)

C1. Agriculture is the main cause of deforestation. ✅ True
C2. Wildlife sanctuaries allow tourism. ✅ True
C3. National Parks protect only animals. ✅ False (flora+fauna)
C4. Endemic species are found everywhere. ✅ False (one place only)
C5. Paper recycling saves trees. ✅ True
C6. Reforestation = planting barren land. ✅ False (existing forest land)
C7. The Red Data Book lists all animals. ✅ False (endangered only)
C8. Floods are caused by deforestation. ✅ True
C9. Biosphere reserves have no human activity. ✅ False (3 zones)
C10. Gir Forest protects Asiatic lions. ✅ True

🟩 Part D: Short Answers (10 Questions)

D1. Define biodiversity.
✅ Answer: A variety of different species of plants, animals, and microorganisms living in a particular area.

D2. Name 3 causes of deforestation.
✅ Answer: Agriculture, logging, and infrastructure development.

D3. What is the Red Data Book?
✅ Answer: Book containing a list of endangered plant and animal species.

D4. Differentiate flora and fauna.
✅ Answer: Flora = plants of region; Fauna = animals of region.

D5. What is an endemic species? Give an example.
✅ Answer: Species found only in one area. Ex: Lion-tailed macaque (Western Ghats).

D6. Why are national parks stricter than sanctuaries?
✅ Answer: Protect both flora+fauna with minimal human interference.

D7. Define reforestation.
✅ Answer: Restocking the destroyed forest by planting trees on the same land.

D8. 2 consequences of deforestation.
✅ Answer: Soil erosion, global warming (or floods, habitat loss).

D9. What is a biosphere reserve?
✅ Answer: Large area protecting biodiversity + allowing sustainable human activity.

D10. How does paper recycling help conservation?
✅ Answer: Reduces need to cut trees for paper production (1 ton = 17 trees saved).

🟧 Part E: Long Answers (5 Questions)

E1. Explain 5 causes and 5 consequences of deforestation.
✅ Answer:
Causes: 1) Agriculture – forests → crop fields; 2) Logging – timber industry; 3) Infrastructure – roads/dams/cities; 4) Fuelwood – cooking in villages; 5) Mining – minerals extraction.
Consequences: 1) Global warming (CO₂ increase); 2) Soil erosion (roots gone); 3) Floods (fast water flow); 4) Habitat loss (animals homeless); 5) Less rainfall (water cycle disturbed).

E2. Compare Wildlife Sanctuary, National Park, and Biosphere Reserve.
✅ Answer: (Use table from notes above – perfect 5-mark answer)

E3. What is biodiversity? Why conserve it?
✅ Answer: Biodiversity = variety of life forms. Conserve because: 1) Food chain balance; 2) Medicine from plants; 3) Clean air (photosynthesis); 4) Water cycle regulation; 5) Aesthetic/recreational value; 6) Economic benefits (tourism, timber).

E4. Explain reforestation, afforestation, and paper recycling with examples.
✅ Answer: Reforestation = replant cut forest (Teak in MP). Afforestation = barren land trees (mangroves, Gujarat). Paper recycling = old paper → new paper (saves 17 trees/ton).

E5. “Every student is environment protector.” Explain 5 ways.
✅ Answer: 1) Use both notebook sides; 2) Plant a tree yearly; 3) Avoid plastic; 4) Report tree cutting; 5) Join Van Mahotsav; 6) Save paper/electricity/water.