CBSE Class 7 Social Science (Our Environment) Important Questions

Below are 10 Important Questions from Class 7 Social Science (Our Environment) chapters that are Important for preparing well and understanding concepts easily.

1. What is the environment, and what are its components? 

Ans: The environment refers to the surroundings in which living and non-living things exist. It comprises two main components: biotic factors, which include all living organisms (plants, animals, and humans), and abiotic factors, which include non-living elements like air, water, soil, and sunlight. These components interact with each other, forming ecosystems that support life and influence the Earth's processes.

2. What are the different layers of the Earth?

Ans: The Earth is made up of three primary layers: the crust, the mantle, and the core. The crust is the thin outer layer where we live and contains landforms and bodies of water. Below the crust is the mantle, composed of semi-solid rock that can flow slowly over time. The core, located at the centre of the Earth, consists of a solid inner core and a liquid outer core, primarily made of iron and nickel, contributing to the Earth's magnetic field.

3. How do natural forces change the Earth's surface? 

Ans: Natural forces such as erosion, weathering, and volcanic activity play significant roles in shaping the Earth's surface. Erosion involves the removal and transport of soil and rock by wind, water, or ice. Weathering breaks down rocks into smaller particles through physical and chemical processes. Volcanic eruptions can create new landforms and change existing landscapes by depositing lava and ash, illustrating the dynamic nature of the Earth's surface.

4. What is the composition of air? 

Ans: Air is a mixture of gases that surrounds the Earth. Its primary components are nitrogen (about 78%) and oxygen (about 21%). Other gases, such as argon, carbon dioxide, and water vapour, make up a small percentage. The composition of air is crucial for supporting life: oxygen is essential for respiration, while carbon dioxide is vital for photosynthesis in plants, thus maintaining the balance in the ecosystem.

5. Why is water important for life? 

Ans: Water is essential for all living organisms and plays a critical role in various biological processes. It is required for drinking, sanitation, and agriculture, and it regulates body temperature through sweating and respiration. Water also provides habitats for aquatic life and is involved in nutrient transport within organisms. The availability of clean water is vital for health, food production, and sustaining ecosystems.

6. How do humans interact with tropical and subtropical regions? 

Ans: Humans interact with tropical and subtropical regions through agriculture, trade, and resource utilization. These regions are often rich in biodiversity and resources, leading to practices like farming (crops such as rice and tropical fruits) and logging for timber. However, such interactions can result in deforestation and habitat loss, emphasising the need for sustainable practices to balance economic development with environmental conservation.

7. What are the characteristics of life in deserts? 

Ans: Life in deserts is adapted to extreme temperatures and scarce water resources. Plants like cacti have thick skins and spines to minimise water loss and store moisture. Animals such as camels, reptiles, and insects have adaptations that allow them to conserve water and tolerate high temperatures. Desert communities often rely on specific behaviours and adaptations for survival, demonstrating resilience in harsh conditions.

8. What are the causes of environmental degradation? 

Ans: Environmental degradation is caused by various human activities, including deforestation, pollution, urbanization, and over-exploitation of natural resources. Deforestation leads to habitat loss and increased carbon emissions, while pollution from industries and vehicles contaminates air, water, and soil. Overuse of resources, such as water and minerals, strains ecosystems and disrupts ecological balance, emphasising the need for sustainable practices.

9. How do humans impact the water cycle? 

Ans: Human activities significantly impact the water cycle through urbanisation, deforestation, and pollution. Urbanisation increases surface runoff and reduces groundwater recharge, while deforestation disrupts natural water absorption. Pollution from industries and agriculture contaminates water bodies, affecting aquatic ecosystems and drinking water sources. Understanding these impacts is essential for managing water resources sustainably.

10. What role do forests play in maintaining ecological balance? 

Ans: Forests play a crucial role in maintaining ecological balance by providing habitats for diverse wildlife, producing oxygen through photosynthesis, and absorbing carbon dioxide, which helps mitigate climate change. They also prevent soil erosion, conserve water, and regulate temperature. Additionally, forests offer resources like timber, food, and medicinal plants, highlighting their importance for both ecosystems and human well-being.

How do Social Science Important Questions Class 7 Help you with Exams?

• Important questions for Class 7 Social Science focus on key topics and concepts, ensuring students study the most relevant material for exams.

• Practising these questions enhances understanding of historical events, geographical concepts, and social issues.

• Engaging with important questions improves memory retention, as students actively recall and summarise information.

• Answering these questions helps develop writing skills, enabling clearer articulation of thoughts in exams.

• They familiarise students with the types of questions that may appear in exams, reducing anxiety and improving confidence.

• Important questions encourage critical thinking and analysis, allowing students to interpret and apply knowledge effectively.

• Working through these questions helps identify strengths and weaknesses, guiding focused study efforts before the exam.

• They promote collaborative learning when discussed in study groups, enhancing comprehension through peer interaction.

• Practising under timed conditions improves time management skills, ensuring completion of exam questions within the allotted time.

CBSE Class 7 Social Science (Our Environment) Important Questions are valuable resources for students preparing for exams. They help students focus on essential topics and enhance their understanding of environmental issues, human interactions, and geography. By practising these questions, students can build confidence and improve their writing skills. Additionally, these questions provide a clear overview of what to expect in exams, making revision more effective. Overall, engaging with important questions supports students in achieving success in their studies and feeling well-prepared for their exams.

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