"Discoveries Induced by World Maps" PPT teaching courseware download 4

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"Discoveries Induced by World Maps" PPT teaching courseware download 4

Read the text freely, pronounce the words accurately, and think: What does this text mainly talk about Wegener?

This article tells the story of the German geophysicist Wegener's discovery of the theory of continental drift.

Wegener (1880-1930) was a famous German astronomer, meteorologist and geophysicist. In 1915, he published the book "The Origin of Land and Sea", which comprehensively demonstrated the theory of continental drift. In the book, he synthesized knowledge and facts from geomorphology, geology, geophysics, paleontology, paleoclimatology, etc., and systematically discussed the views and arguments about continental drift from the perspectives of different disciplines, forming a comparative A complete theoretical system. In order to obtain first-hand information and further demonstrate the hypothesis of continental drift, he went to Greenland in the Arctic for four expeditions, but unfortunately died during the fourth expedition.

How did Wegener's fantasy about continental drift come about? Please read paragraphs 2, 3, and 4 freely and complete the following exercises later.

Wegener first discovered ( ), then ( ), and then ( ) on the world map of the ward.

How can we tell that Wegener was not a man who changed his mind easily? (6--8)

1. The famous scientist advised him to give up his idea and not to waste his efforts, but he still firmly believed in his idea. "A waste of effort": a waste of effort.

2. Examine the connections and comparisons between continents.

3. He searched for evidence of continental drift in a vast sea of ​​data. "A vast ocean" describes a very rich collection of literature.

reasoning:

A reptile called Mesosaurus was found in both eastern Brazil and southwestern Africa. Obviously, these animals lived on the same continent at that time. Otherwise, even with wings, it would be difficult to fly across the ocean.

Wegener discovered and verified the continental drift hypothesis, and his persistence in exploring the mysteries of nature was highly praised.

Understand the truth:

Careful observation, careful thinking, and repeated demonstrations are indispensable factors for Wegener's success.

Waste of effort, vast sea

Flying across the ocean information

convene origin at right angles

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Update Time: 2024-10-19

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