Advertisements
Online Mock Tests
Chapters
2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
▶ 24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 24 - Environmental Science - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 24 - Environmental Science")
Advertisements
Solutions for Chapter 24: Environmental Science
Below listed, you can find solutions for Chapter 24 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 24 Environmental Science Exercise [Page 300]
Choose the correct answer
All the factors of biosphere which affect the ability of organisms to survive and reproduce are called as ______.
biological factors
abiotic factors
biotic factors
physical factors
The ice sheets from the north and south poles and the icecaps on the mountains, get converted into water vapour through the process of ______.
evaporation
condensation
sublimation
infiltration
The atmospheric carbon dioxide enters into the plants through the process of ______.
photosynthesis
assimilation
respiration
decomposition
Increased amount of ______ in the atmosphere, results in greenhouse effect and global warming.
carbon monoxide
sulphur dioxide
nitrogen dioxide
carbon dioxide
Match the following.
| Microorganism | Role Played |
| Nitrosomonas | Nitrogen fixation |
| Azotobacter | Ammonification |
| Pseudomonas species | Nitrification |
| Putrefying bacteria | Denitrification |
State whether true or false. If false, correct the statement
Nitrogen is a greenhouse gas.
True
False
Poorly developed root is an adaptation of mesophytes.
True
False
Bats are the only mammals that can fly.
True
False
Earthworms use the remarkable high-frequency system called echoes.
True
False
Aestivation is an adaptation to overcome the cold condition.
True
False
Give reason for the following
Roots grow very deep and reach the layers where water is available. Which type of plants develops the above adaptation? Why?
Why streamlined bodies and presence of setae is considered as adaptations of earthworm?
Why is it impossible for all farmers to construct farm ponds in their fields?
Answer briefly
What are the two factors of biosphere?
How do human activities affect nitrogen cycle?
What is adaptation?
What are the challenges faced by hydrophytes in their habitat?
Why is it important to conserve water?
List some of the ways in which you could save water in your home and school.
What are the uses of recycled water?
What is IUCN?
What is the vision of IUCN?
Answer in detail
Describe the processes involved in the water cycle.
Explain carbon cycle with the help of a flow chart.
List out the adaptations of xerophytes.
How does a bat adapt itself to its habitat?
What is water recycling? Explain the conventional wastewater recycling treatment methods.
Solutions for 24: Environmental Science
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 24 - Environmental Science
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 24 (Environmental Science) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Samacheer Kalvi textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 9 TN Board chapter 24 Environmental Science are International Union for Conservation of Nature and Natural Resources (IUCN), Biogeochemical Cycle, Water Cycle, The Carbon Cycle, Adaptations of Plants, Adaptation in Aquatic Plants (Hydrophytes), Adaptation in Desert Plants (Xerophytes), Adaptation in Grassland Plants (Mesophytes), Adaptation for Blending with the Surroundings, Fresh Water Management, Waste Water Management, Nitrogen Cycle.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Environmental Science exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
Get the free view of Chapter 24, Environmental Science Science [English] Class 9 TN Board additional questions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education, and you can use Shaalaa.com to keep it handy for your exam preparation.
