Distribution Of Oceans And Continents

Question 1

Name the first three scientist who proposed the idea of landmass being one in chronological order .

What was the name of the theory of Alfred? In which year he proposed the theory?

Answer 1

Abraham ortelius
Antonio pellegrini
Alfred Wegener

Question 2

According to Alfred how many years ago when pangea begin to split?

Answer 2

200 million years ago

Question 3

Evidence of continental drift
* How old is the ancient rock found on course or Africa and Brazil?
* Name continents in which tillets is found
* Placer deposits of gold are found on cost of which two countries?
* In which continents lemur is found?
* In which two countries skeleton of mesosaurus found

Answer 3

• 2000 million years
• Gondwana island- india africa Falkland Madagascar Antarctica australia
• Ghana coast and brazil coast…source rocks in Brazil
• India Madagascar africa(lemuria)
• South africa and brazil

Question 4

Who gave convectional current theory?
In which year?
Why convectional current generate?

Answer 4

Arthur holmes
1930s
Due to radioactive elements causing thermal difference in the metal portion.

Question 5

What is magnetism of past rocks called? To which study it is associated?

Answer 5

Paleomagnatism
Study of Mid oceanic ridges, age of rocks formed is determined by their magnetism compared to earth