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Geography Distinguish between

Tides · Maharashtra Board STD 7 (MSBSHSE - English Medium). 3 questions.

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Question 12 Marks
Spring tide and neap tide.
Answer
Spring tideNeap Tide
(i) It occurs on the new moon day and the full moon day.(i) It occurs on the the first and the third quarter days.
(ii) The gravitational pull of the moon and the sun as well as that of the earth are in a straight line and act in the same direction.(i) The gravitational pull of the moon and the sun are at right angle.
(iii) Spring tides are a little higher than the average high tides and a little lower than the average low tides.(iii) Neap tides are a little lower than the average high tides and little higher than the average low tides.
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Question 22 Marks
High tide and low tide:
Answer
High tideLow Tide
(i) The rise in the level of sea water is caused by the combined effect of centrifugal and gravitational force of the moon and the sun.(i) The fall in the level of sea water is caused by the combined effect of centrifugal and gravitational force of the moon and the sun.
(ii) At the time of high tide, sea water is very close to the coast.(ii) At the time of low tide, sea water is far away from the coast.
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Question 32 Marks
Centrifugal force and Gravitational
Answer
Centrifugal forceGravitational force
(i) Due to rotation, the earth gets a type of power of force. This force works away from the centre. It is called centrifugal force.(i) Gravitational force is working towards the centre of the earth. This force is many times greater than the centrifugal force.
(ii) Centrifugal force works away from the centre.(ii) Gravitational force works towards the centre.
(iii) Due to centrifugal force an object on the earth would be thrown into the space.(iii) Due to gravitational force an object on the surface of the earth remains at the place where it exists.
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