Frequently Asked Questions On 7th Geography Chapter 3
What Are Lithospheric Plates?
The lithosphere is broken into a number of plates known as the Lithospheric plates.
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What Are Lithospheric Plates?
Why Do Lithospheric Plates Move?
Lithospheric plates move around very slowly тАУ just a few millimetres each year. This is because of the movement of the molten magma inside the earth. The molten magma inside the earth moves in a circular manner.
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What Are The Forces That Act In The Interior Of The Earth?
The forces which act in the interior of the earth are called as Endogenic forces and the forces that work on the surface of the earth are called as Exogenic forces. Endogenic forces sometimes produce sudden movements and at the other times produce slow movements. Sudden movements like earthquakes and volcanoes cause mass destruction over the surface of the earth.
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What Is Meant By FOCUS And EPICENRE Or An Earthquake?
When the Lithospheric plates move, the surface of the earth vibrates. The vibrations can travel all-round the earth. These vibrations are called earthquakes. The place in the crust where the movement starts is called the focus. The place on the surface above the focus is called the epicentre.
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How Is The Strength Of An Earthquake Measured?
An earthquake is measured with a machine called a seismograph. The magnitude of the earthquake is measured on the Richter scale. An earthquake of 2.0 or less can be felt only a little. An earthquake over 5.0 can cause damage from things falling. A 6.0 or higher magnitude is considered very strong and 7.0 is classified as a major earthquake.
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Where Should We Go To Take Shelter During An Earthquake?
Safe Spot тАУ Under a kitchen counter, table or desk, against an inside corner or wall.
Stay Away from тАУ Fire places, areas around chimneys, windows that shatter including mirrors and picture frames.
Be Prepared тАУ Spread awareness amongst your friends and family members and face any disaster confidently\
How Do Different Landforms Create On Earth?
The landscape is being continuously worn away by two processes тАУ weathering and erosion. Weathering is the breaking up of the rocks on the earthтАЩs surface. Erosion is the wearing away of the landscape by different agents like water, wind and ice. The eroded material is carried away or transported by water, wind, etc. and eventually deposited. This process of erosion and deposition create different landforms on the surface of the earth.
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What Are Sea Caves?
The erosion and deposition of the sea waves gives rise to coastal landforms. Sea waves continuously strike at the rocks. Cracks develop. Over time they become larger and wider. Thus, hollow like caves are formed on the rocks. They are called sea caves.
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