Think and write about the probable changes of the Earth's Surface in future. Will rivers, sea waves, glaciers and all exist?
I need this answer guys..of class 9 ..plz make it simple and not so longi will be grateful.
Answers
Q1. Define: (a) Endogenic Forces (b) Exogenic Forces (c) Lithospheric Plates
Ans 1:
(a) Endogenic Forces: Forces which are working in the interior of the earth leading to earth movements, earthquakes and volcanic eruption are known as endogenic forces.
(b) Exogenic Forces: Forces which are working on the surface of the earth leading to the erosional and depotional features of wind, water and ice are known as exogenic forces.
(c) Lithospheric Plates: The crust of the earth is broken into a number of large and small plates known as the lithospheric plates.
Q2. What is volcano? What are its types?
Ans 2: Natural openings in the earth's crust through which molten materials, rocks, ashes, gases, etc are thrown out are called 'Volcanoes'. Volcanoes are classified into three types:
(a) Active Volcanoes: These volcanoes erupt frequently and give out gases, ash, lava, etc. e.g. Mt. Etna in Italy.
(b) Dormant Volcanoes: These are also known as 'Sleeping Volcanoes'. They erupt after a very long time. E.g. Mt. Vesuvius in Italy.
(c) Extinct Volcanoes: These are also known as 'Dead Volcanoes'. They have been inactive since a very long time. E.g. Mt. Kilimanjaro in East Africa.
Q3. What do you mean by 'Focus' and 'Epicentre'?
Ans 3: Focus: The point of origin of an earthquake is called its Focus.
Epicenter: The point directly/vertically above the focus on the earth's surface is known as Epicenter.
Q4. What are meanders?
Ans 4: Curves and large bends or loops formed by rivers in the plains are known as meanders.
Q5. Define the term 'Aggradation'.
Ans 5: The process of depositing the eroded material is called aggradation.
In my view, the earth won't change more in future because of technology. Technology will upgrade everything. If we use our resources carefully, maybe nothing will change in future. As in case of rivers, sea waves etc they may change because we are using water so much, which may lead the water level to decrease it's level.
hope it helps
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