"Changes of Sea and Land" PPT courseware

Description

"Changes of Sea and Land" PPT courseware

Part One: Teaching Objectives

1. Use examples to illustrate the changes of sea and land, and establish the scientific perspective of dialectical materialism on the continuous movement and change of sea and land.

2. Understand the basic concepts of continental drift and plate tectonics, and be able to explain the distribution of major mountain systems, volcanoes, and earthquakes in the world.

3. Through the development process of continental drift-plate tectonics theory, educate students on the history of science and cultivate their scientific interests, scientific methods and inquiry spirit.

Important and difficult points: Understanding the theory of plate tectonics and the theory of continental drift

Part 2 content: Class discussion

Discussion: What caused the changes in the sea and land?

induction:

Modern scientific research shows that changes in the earth's crust and rise and fall of sea levels are the main causes of changes in sea and land.

Human activities, such as "reclamation", etc., will also cause changes in the sea and land.

Looking at the map, what wonderful phenomena will you find on the east coast of Africa and South America?

A piece of paper that makes you want to tear apart when you look at two continents can be pieced together. Could they be the same continent?

Inspiration from the world map

One day in 1910, the 30-year-old German scientist Wegener was lying on his hospital bed and his eyes happened to fall on a world map on the wall. "Strange! Why are the concave and convex contours of the continents on both sides of the Atlantic so consistent?" His My mind could no longer calm down: "Could the African continent and the South American continent have been connected before? It was only later that they were separated due to some kind of force. Could the continents be drifting?"

Part Three: Geographic Phenomenon

Phenomenon explanation

Manatees inhabit shallow tropical marine environments, and ostriches live on land and do not fly far. Logically speaking, none of them has the ability to travel far across the ocean. They live at the same latitude on both sides of the Atlantic. Can you explain this coincidence?

induction:

1. The ancient stratigraphic distribution of the South American continent and the African continent correspond, indicating that the two were originally the same continent!

2. The African continent and the South American continent, located on both sides of the Atlantic Ocean, have similar animals, manatees and ostriches, living in the same place. This can show that their ancestors lived together and prove that the South American continent and the African continent are the same continent!

Reading and understanding

Think about it, what deep revelations can we get from the story of Wegener and continental drift?

The spirit of serious exploration, the courage to doubt, and the courage to practice, as well as the strong will quality

Part 4: Picture Reading and Analysis

1. How many major plates can the earth’s surface be divided into? Except which plate is almost entirely oceanic, other plates include continents as well as oceans?

2. In the picture

What does "→←" mean?

What does "←→" mean?

3. What is the difference in terms of movement speed between the interior of the plate and the edge of the plate?

induction:

1. The theory of plate tectonics believes that the earth’s lithosphere is composed of six major plates: the Eurasian plate, the Indian Ocean plate, the African plate, the Pacific plate, the American plate, and the Antarctic plate.

2. Among them, the Pacific plate is almost entirely oceanic, and the other plates include both continents and oceans. Generally speaking, the interior of the plate is relatively stable. In the junction area between plates, some are stretched violently, some are collided and squeezed, and the crust is relatively active.

3. “→←” in the picture means collision and extrusion. “←→” in the picture means tension and stretching.

Keywords: Free download of Geography PPT courseware for the second volume of the sixth grade of Shanghai Education Edition, PPT download of changes in sea and land, .PPT format;

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"Changes of Sea and Land" PPT download:

"Changes of Sea and Land" PPT download Part 1: Content objectives of this section: Give examples to illustrate that the land and sea on the earth's surface are in constant movement and change. Know the theory of continental drift and be able to use this theory to solve some problems. Changes in the sea. Changes in the sea, which can be referred to as...

"Changes of Sea and Land" PPT:

"Changes of Sea and Land" PPT Part One Content: Course Questions Ask the question: What was the land like hundreds of millions of years ago? Establishing a hypothesis: Continental drift theory 200-300 million years ago, there was only one continent on the earth. Later, this supercontinent split into several continents, and...

"Changes of Sea and Land" Land and Ocean PPT Courseware 8:

"Changes of Sea and Land" Land and Ocean PPT Courseware 8 Learning Objectives Understand the causes of changes in sea and land. Understand the founder, content and evidence of the theory of continental drift. Understand the main content of the theory of plate tectonics, the direction of plate movement and the volcanic and seismic zones on the earth. Independent reading 3..

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Update Time: 2024-10-19

This template belongs to Geography courseware Shanghai Education Edition Geography for Sixth Graders Volume 2 industry PPT template

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