Q4.B] Identify and name the internal movements: 3M
1.) Tsunamis are generated in coastal areas.
2.) Rift valley is formed because of faulting.
3.) Molten magma is thrown out of the earth’s mantle.
Answers
2) Molten magma is thrown out of the Earth's mantle.
3) Rift valley is formed because of faulting
Q.4 Distinguish between. (any ONE)
1) Earthquake and Volcanoes
2) Choropleth and Isopleth
Q.5 Give Reasons.
1). The main aim of distribution maps is to show location.
2) Most of the volcanoes are found on the plate bounderies.
Q.6 Answer in brief.
1) Explain the types of Seismic waves.
2) What are the effects of Earthquake on the earth's surface and
human life.
Answer:
1.)
Sudden internal movements within the earth's crust below the ocean floor that lead to earthquakes and volcanic eruptions can cause tsunamis.
Explanation:
A tsunami is a seismic sea wave which is caused by the displacement of a large volume of water, generally in an ocean or a large lake.
2.)
A rift valley is a linear shaped lowland between several Highlands or mountain ranges created by the action of the geologic rift or fault. A rift valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepened by the forces of erosion.
3.)
Molten magma is thrown out to earth's mantle. The type of interval movement is convection currents. The plate diverge due to the pressure created by the currents. This causes the magma to be thrown out to the earth's crust.