29 Questions
What percentage of tropical forests may be lost in the coming six decades if the current rate of deforestation continues?
90%
Which region shows a declining trend in forest area, particularly in the tropical region?
Asia
What is estimated to be the principal cause of deforestation in Africa, Asia, and tropical America according to the text?
Shifting cultivation
In which areas is shifting cultivation prevalent according to the text?
Northeast India
What practice involves clearing forest lands to grow subsistence crops in tribal areas?
Shifting cultivation
Which activity is NOT mentioned as a cause of deforestation in the text?
Marine conservation efforts
What is the primary source of tidal energy?
Gravitational attraction between celestial bodies
What creates corresponding motions or currents in the world's oceans?
Tidal forces
Why are the changes in sea levels due to tidal forces highly regular and predictable?
Due to the consistent pattern of the Earth's rotation and the Moon's orbit
What do the magnitude and variations of tidal motions reflect?
Changing positions of the Moon and Sun relative to the Earth
What determines the predictability of tidal changes?
Local geography of seafloor and coastlines
What can be defined as any material which can be transformed in a way that it becomes more valuable and useful?
Natural resource
Which process is responsible for the transformation of valuable items from resources?
Resource extraction
What is the term used to describe the decline in the quality of land resources due to various factors like overgrazing and agriculture?
Land degradation
Which type of energy resource includes fossil fuels like coal and their advantages and limitations?
Non-renewable energy
What is the term for the process by which fertile land becomes desert-like due to various factors like climate change and human activities?
Desertification
Which form of energy resource relies on capturing energy from the sun, wind, or geothermal sources?
Solar energy
What type of relief features are found in India according to the text?
Mountains, plateaus, and plains
What is the process called when the soil cover is denuded and washed down?
Soil erosion
What is the cause of soil erosion according to the text?
Both natural forces and human activities
What is the term used for the deep channels created by running water cutting through clayey soils?
Gullies
What is the name given to the process where water flows as a sheet over large areas down a slope, washing away the topsoil?
Sheet erosion
What is the term used for the process where wind blows loose soil off flat or sloping land?
Wind erosion
What is the main benefit of recycling aluminum products compared to refining bauxite?
Recycling aluminum requires less electric power
According to the passage, which of the following minerals can also be recycled?
Nickel, chromium, lead, copper, and zinc
What is the purpose of the laws mentioned in the passage?
To ensure efficient management of mining resources
What is the role of the Aravalli mountain range mentioned in the passage?
It plays an important role in controlling the climate and acting as a mini water shed
What was the impact of marble mining near Rajsamand Lake?
It led to the drying up of the lake
What is the main source of food for the majority of people according to the passage?
Cultivated plants and domesticated animals
Explore the topics of food resources, world food problems, changes from agriculture and overgrazing, modern agriculture effects, land resources, land degradation, equitable use of land resources, soil erosion, desertification, and mapping in EVS Unit 2. Test your knowledge and understanding of these important environmental concepts.
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