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Mind Map- Our Changing Earth | Social Studies (SST) Class 7 (Old NCERT) PDF Download
The document Mind Map- Our Changing Earth | Social Studies (SST) Class 7 (Old NCERT) is a part of the Class 7 Course Social Studies (SST) Class 7 (Old NCERT).
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FAQs on Mind Map- Our Changing Earth - Social Studies (SST) Class 7 (Old NCERT)
| 1. What are the major factors contributing to changes in the Earth's surface? |  |
Ans. The major factors contributing to changes in the Earth's surface include natural processes such as erosion, weathering, volcanic activity, tectonic movements, and human activities like deforestation, mining, and urbanization. These factors can reshape landscapes and alter ecosystems over time.
| 2. How do tectonic plates affect our planet? | |
Ans. Tectonic plates are large sections of the Earth's crust that move and interact at their boundaries. Their movements can cause earthquakes, volcanic eruptions, and the formation of mountains. These processes continually change the Earth's surface and contribute to geological activity.
| 3. What role do humans play in changing the Earth's environment? | |
Ans. Humans significantly impact the Earth's environment through activities such as industrialization, agriculture, and urban development. These activities can lead to deforestation, pollution, and climate change, affecting natural ecosystems and biodiversity.
| 4. How does climate change affect the Earth's surface and ecosystems? | |
Ans. Climate change leads to rising temperatures, melting ice caps, and changing weather patterns, which can cause sea-level rise, habitat loss, and increased frequency of extreme weather events. These changes can disrupt ecosystems and threaten various species, including humans.
| 5. What is soil erosion, and why is it a concern for our environment? | |
Ans. Soil erosion is the process by which the top layer of soil is removed due to wind, water, or human action. It is a concern because it can lead to reduced agricultural productivity, loss of soil fertility, and increased sedimentation in rivers and streams, negatively affecting water quality and ecosystems.
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