Q1: What are the three major relief features that characterize the continents?
Ans: Mountains, plateaus, and plains.
Q2: Name an example of a young fold mountain.
Ans: The Himalayas.
Q3: Explain how block mountains are formed.
Ans: Block mountains are formed when parts of the Earth's plates move due to tectonic forces, creating uplifted areas known as horsts.
Q4: What is the significance of plateaus?
Ans: Plateaus are rich in minerals, have fertile soil, and are important for agriculture.
Q5: Why are plains densely populated?
Ans: Plains provide fertile soil for farming and good living conditions.
Q1: Describe the three main processes that lead to the formation of mountains.
Ans: Mountains are formed by folding, faulting, and volcanic eruptions. Folding happens when rocks are pushed together, creating folds. Faulting occurs due to tectonic plate movements, resulting in block mountains or rift valleys. Volcanic mountains are formed when magma erupts from the Earth's crust.
Q2: Differentiate between young and old fold mountains.
Ans: Young fold mountains, like the Himalayas, are formed within the last 40 million years and tend to be high and rugged. Old fold mountains, like the Appalachians, were formed 200-300 million years ago and are less rugged.
Q3: Explain what a rift valley is and how it is formed.
Ans: A rift valley is formed when the land between faults sinks down due to tectonic movements. It is created through the process of faulting.
Q4: How are plateaus different from mountains?
Ans: Plateaus are flat-topped elevated areas, while mountains are raised steeply with peaks. Plateaus can form through geological forces like tectonics and erosion, while mountains result from processes like folding and volcanic activity.
Q5: Discuss the significance of mountains and plateaus for human activities.
Ans: Mountains and plateaus provide resources like water from melting glaciers, act as physical barriers, and are crucial for economic activities such as tourism and agriculture. Plateaus are rich in minerals and fertile soil, making them valuable for cultivation.
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65 videos|125 docs|25 tests
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