Physics, asked by Rinaax8747, 1 year ago

What are the reasons behind dynamics of ocean current

Answers

Answered by rumutoniwase333
0

Answer:

Explanation:

In the previous chapter, you have studied the

interior of the earth. You are already familiar

with the world map. You know that continents

cover 29 per cent of the surface of the earth

and the remainder is under oceanic waters.

The positions of the continents and the ocean

bodies, as we see them in the map, have not

been the same in the past. Moreover, it is now

a well-accepted fact that oceans and

continents will not continue to enjoy their

present positions in times to come. If this is

so, the question arises what were their positions

in the past? Why and how do they change their

positions? Even if it is true that the continents

and oceans have changed and are changing

their positions, you may wonder as to how

scientists know this. How have they determined

their earlier positions? You will find the answers

to some of these and related questions in this

chapter.

CONTINENTAL DRIFT

Observe the shape of the coastline of the Atlantic

Ocean. You will be surprised by the symmetry

of the coastlines on either side of the ocean. No

wonder, many scientists thought of this

similarity and considered the possibility of the

two Americas, Europe and Africa, to be once

joined together. From the known records of the

history of science, it was Abraham Ortelius, a

Dutch map maker, who first proposed such a

possibility as early as 1596. Antonio Pellegrini

drew a map showing the three continents together.

However, it was Alfred Wegener—a German

meteorologist who put forth a comprehensive

argument in the form of “the continental drift

DISTRIBUTION OF OCEANS

AND CONTINENTS

CHAPTER

theory” in 1912. This was regarding the

distribution of the oceans and the continents.

According to Wegener, all the continents

formed a single continental mass and mega

ocean surrounded the same. The super

continent was named PANGAEA, which meant

all earth. The mega-ocean was called

PANTHALASSA, meaning all water. He argued

that, around 200 million years ago, the super

continent, Pangaea, began to split. Pangaea first

broke into two large continental masses as

Laurasia and Gondwanaland forming the

northern and southern components

respectively. Subse-quently, Laurasia and

Gondwanaland continued to break into various

smaller continents that exist today. A variety of

evidence was offered in support of the

continental drift. Some of these are given below.

Evidence in Support of the Continental Drift

The Matching of Continents (Jig-Saw-Fit)

The shorelines of Africa and South America

facing each other have a remarkable and

unmistakable match. It may be noted that a

map produced using a computer programme

to find the best fit of the Atlantic margin was

presented by Bullard in 1964. It proved to be

quite perfect. The match was tried at 1,000-

fathom line instead of the present shoreline.

Rocks of Same Age Across the Oceans

The radiometric dating methods developed in

the recent period have facilitated correlating the

rock formation from different continents across

Answered by ItzNorah
3

Hi mate

Question

What is the reason behind the dynamic of the ocean water?

Answer:

  • The Ocean water is not still. There is a continuous vertical and horizontal movement of water.

  • The horizontal continuous flow of a mass of a water from one place to another gives rise to an ocean current.

  • Many factors are responsible for this movement of water. They are driven by density, temperature gradients, planetary wind etc.

  • Due to uneven heating of the earth, surplus heat is accumulator at the equator which was the transferred to the poles through ocean current.

  • The direction of flow of ocean current is also dependent on the continent the structure and the rotation of the earth.

  • The shape and position of a coastline play a crucial role in guiding the direction of ocean current.

  • The rotation of the earth results in the ocean current to move in clockwise direction in Northern hemisphere and anticlockwise and Southern hemisphere.

I Hope This Would Help You

Pls mark as Brainliest

Thank my answer and do follow..

Similar questions