Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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Samacheer Kalvi solutions for Social Science Class 9th Tamil Nadu State Board chapter 2 - Biosphere [Latest edition]

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Chapters

Social Science Class 9th Tamil Nadu State Board - Shaalaa.com

Chapter 2: Biosphere

Exercise
Exercise [Pages 207 - 208]

Samacheer Kalvi solutions for Social Science Class 9th Tamil Nadu State Board Chapter 2 Biosphere Exercise [Pages 207 - 208]

Choose the correct answer

Exercise | Q I. 1 | Page 207

The coldest biome on Earth is.

  • Tundra

  • Taiga

  • Desert

  • Oceans

Exercise | Q I. 2 | Page 207

This is the smallest unit of biosphere.

  • Ecosystems

  • Biome

  • Environment

  • None of the above

Exercise | Q I. 3 | Page 207

Nutrients are recycled in the atmosphere with the help of certain micro organisms, referred to as.

  • Producers

  • Decomposers

  • Consumers

  • None of the above

Exercise | Q I. 4 | Page 207

To which climatic conditions are Xerophytic plants specifically adapted to?

  • Saline and sandy

  • Limited moisture availability

  • Cold temperature

  • Humid

Exercise | Q I. 5 | Page 208

Why is the usage of rainforest biomes for large scale agriculture unsustainable?

  • because it is too wet

  • because the temperature is too warm

  • because the soil is too thin

  • because the soil is poor

Assertion type questions.

Exercise | Q II. 1 | Page 208

A: Heterotrophs do not produce their own food.

R: They depend on autotrophs for their nourishment.

  • Both assertion (A) and Reason(R) are true; R explains A

  • Both assertion(A) and reason(R) are true; R does not explain A

  • A is true; R is false

  • Both A and R are false

Exercise | Q II. 2 | Page 208

A: Hotspots are the regions characterized by numerous endemic plants and animal species living in a vulnerable environment.

R: To manage and focus on conservation work more effectively, researchers identified hotspots.

  • Both assertion (A) and Reason(R) are true; R explains A

  • Both assertion(A) and reason(R) are true; R does not explain A

  • A is true; R is false

  • Both A and R are false

Fill In The Blanks

Exercise | Q III. 1 | Page 208

An area where animals, plants and micro organisms live and interact with one another is known as _________.

Exercise | Q III. 2 | Page 208

___________ are also called Heterotrophs.

Exercise | Q III. 3 | Page 208

__________ is a system of interlocking and independent food chains.

Exercise | Q III. 4 | Page 208

_______ is an extensive large ecosystem.

Exercise | Q III. 5 | Page 208

The vegetative type commonly found in desert biomes is called __________.

Exercise | Q III. 6 | Page 208

__________ is an aquatic biome that is found where fresh water and salt water mix.

Answer the following in brief

Exercise | Q IV. 1 | Page 208

What is Biosphere?

Exercise | Q IV. 2 | Page 208

What is an ecosystem?

Exercise | Q IV. 3 | Page 208

What does the term ‘biodiversity’ mean?

Exercise | Q IV. 4 | Page 208

What is meant by loss of biodiversity?

Exercise | Q IV. 5 | Page 208

Mention the various terrestrial biomes.

Give reasons for the following

Exercise | Q V. 1 | Page 208

Producers are also called autotrophs.

Exercise | Q V. 2 | Page 208

Biosphere provides a stable ecosystem.

Exercise | Q VI. 1 | Page 208

Distinguish between Producers and Decomposers.

Exercise | Q VI. 2 | Page 208

Distinguish between terrestrial biomes and Aquatic biomes.

Exercise | Q VI. 3 | Page 208

Distinguish between Tropical vegetation and Desert vegetation.

Exercise | Q VI. 4 | Page 208

Distinguish between Savannas and Tundra.

Answer the following in a paragraph

Exercise | Q VII. 1 | Page 208

Explain the various components of ecosystem.

Exercise | Q VII. 2 | Page 208

Write a paragraph on the functions of an ecosystem.

Exercise | Q VII. 3 | Page 208

Explain about the aquatic biomes on Earth.

Exercise | Q VIII.1 | Page 208

Find out the date for the following

World Wild Life Day -

Exercise | Q VIII. 2 | Page 208

Find out the date for the following

International Day of Forest -

Exercise | Q VIII. 3 | Page 208

Find out the date for the following

World Water Day -

Exercise | Q VIII. 4 | Page 208

Find out the date for the following

Earth Day -

Exercise | Q VIII. 5 | Page 208

Find out the date for the following

World Environment Day -

Exercise | Q VIII. 6 | Page 208

Find out the date for the following

World Oceans Day -

Map Study

Exercise | Q IX | Page 208

Locate the following on the world outline map.

  1. Prairies
  2. Downs
  3. Tundra Biomes
  4. Equatorial Biomes.

Picture Study

Exercise | Q X | Page 208

Narrate the given food web of Arctic Tundra in your own words.

  • Arctic Tundra Food Wed 

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Chapter 2: Biosphere

Exercise
Social Science Class 9th Tamil Nadu State Board - Shaalaa.com

Samacheer Kalvi solutions for Social Science Class 9th Tamil Nadu State Board chapter 2 - Biosphere

Samacheer Kalvi solutions for Social Science Class 9th Tamil Nadu State Board chapter 2 (Biosphere) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Social Science Class 9th Tamil Nadu State Board solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Social Science Class 9th Tamil Nadu State Board chapter 2 Biosphere are Introduction of Biosphere, Ecosystem, Biomes, Biodiversity.

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