"Polar Regions" PPT courseware 2

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"Polar Regions" PPT courseware 2

1. Unique natural environment

There are two very special regions at the northern and southern ends of the earth: the Antarctic region and the Arctic region, collectively called the Polar Regions.

Antarctic region

Scope: The area south of the Antarctic Circle, including Antarctica and its surrounding waters.

arctic region

Scope: The area north of the Arctic Circle, including most of the Arctic Ocean and parts of the surrounding Asia, Europe, and North America.

Activity: Based on the pictures and materials below, tell us the special characteristics of the natural environment in the Antarctic and Arctic regions?

Antarctic region: This is the coldest region on earth, with an average annual temperature of -50°C. The Antarctic continent is known as the "Ice and Snow Plateau". Most places are covered with thick ice, with an average thickness of more than 2,000 meters. The Antarctic region is also known as the "white desert" on earth. The average annual precipitation is 55 mm, and the places with the lowest precipitation are less than 5 mm. The Antarctic region is also known as the "wind bank" on the earth. The average annual wind speed is 17~18 meters/second, and the maximum wind speed can reach 100 meters/second.

Arctic region: It is not as cold as the Antarctic region, with an average annual temperature of -18°C, and most areas are frozen all year round. The precipitation in the Arctic region is much higher than that in the Antarctic region, with annual precipitation generally ranging from 100 to 250 mm. The wind speed in the Arctic region is far less than that in the Antarctic region, and the average annual wind speed along the Arctic Ocean is only 10 meters/second.

2. A treasure land for scientific investigation

Since the 1920s, many countries have sent scientific research ships or scientific expedition teams to the Antarctic region for inspection.

At present, more than 20 countries have established more than 150 scientific research and experimental stations in the Antarctic region, and more than 2,000 people work on the Antarctic bases in the warm season every year.

There are rich mineral resources buried underground in the Antarctic region, a large amount of solid freshwater resources stored on the ground, and countless marine life inhabiting the sea and coast.

The rich natural resources and pristine natural environment provide scientists with a wide range of natural laboratories for scientific research in geology, glaciers, oceans, biology, meteorology, astronomy and other disciplines.

Large-scale scientific expeditions to the Arctic began in the late 1950s, and their scale far exceeds that of the Antarctic.

The Arctic region is rich in resources. With the discovery and exploitation of oil, natural gas, coal, iron and other resources here, scientific inspections and research on the Arctic region are becoming more and more frequent.

my country's Polar Scientific Exploration Station

◎ On February 14, 1985, my country’s first Antarctic research station, the Great Wall Station, stood on the land of King George Island, Antarctica.

◎ On February 26, 1989, my country’s first East Antarctic expedition team established the spectacular Zhongshan Station on the Antarctic continent through unremitting efforts.

◎ On July 28, 2004, my country’s Arctic scientific research station, the Yellow River Station, was officially completed in the Svalbard Islands in the Arctic Ocean.

◎ On February 2, 2009, my country’s first Antarctic inland research station, the Antarctic Kunlun Station, was officially opened.

Activity: Discuss the significance of my country’s scientific expedition to the polar regions

Chinese scientist Academician Qin Dahe is a member of the International Trans-Antarctic Continent Expedition. He gave a vivid metaphor about the scientific value of expeditions to the Antarctic region. After reading, in small groups, discuss the value of polar scientific expeditions.

Signs of changes in all elements within the Earth's large system, such as climate change, volcanic eruptions, El Niño phenomena, human activities and even solar activity, etc., can be "recorded" in the snow on the Antarctic ice sheet through physical or chemical changes. and glacier ice. In this way, we take snow samples from the Antarctic ice sheet or drill ice cores, just like doctors take a drop of blood from a person's ear. Doctors test blood samples to determine whether people are healthy, we test snow samples to determine the health of the Earth, and deep ice cores tell us about the Earth's history.

3. Environmental Protection in Polar Regions

The hunt for whales in the waters off the Antarctic continent. Excessive hunting of polar animals such as whales will destroy the biodiversity here and thus destroy the ecological environment.

Animals such as seals, sea lions, and walruses in the Arctic are also indiscriminately killed by people. The extraction and processing activities of oil, natural gas and other resources also lead to environmental pollution in the Arctic region. Pictured here are seabirds contaminated by oil spills in the Arctic.

Environmental protection in polar regions has received worldwide attention.

In December 1959, 12 countries including Australia and Argentina signed the Antarctic Treaty for the peaceful use, scientific investigation, and environmental protection of the Antarctic region. my country officially joined the Antarctic Treaty in 1983.

The international community formulated the Arctic Environmental Protection Strategy in 1991.

Think about it:

If you are going on a polar expedition, please select what you need below:

Compass, thermometer, cotton coat, cotton hat, desert shoes, gloves

Sunglasses, visor, raincoat, ice core drill, sailboat

1. Multiple choice questions

1. The best season to explore Antarctica is in the Northern Hemisphere ( )

A. Summer B. Spring

C. Autumn D. Winter

2. The best season to visit the Arctic is in the Northern Hemisphere ( )

A. Summer B. Spring

C. Autumn D. Winter

3. The first scientific research station established by our country in the Antarctic region is ( )

A. Great Wall Station B. Zhongshan Station C. Heping Station D. Dongfang Station

Keywords: polar region teaching courseware, New People's Education Edition seventh grade geography PPT courseware, second volume, seventh grade geography slide courseware download, polar region PPT courseware download, .ppt format

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"Polar Regions" PPT courseware download:

"Polar Regions" PPT courseware download Part One: Ice-covered regions There are very special regions at the northern and southern ends of the earth: the Arctic and Antarctic regions. The Arctic region, located at the northernmost point of the Earth, is the vast area north of latitude 66.5 (Arctic Circle).

"Polar Regions" PPT download:

"Polar Regions" PPT Download Part One: Learning Objectives: 1. Use maps to tell the latitudes, sea and land locations of the North and South Poles. 2. Use data to describe the special characteristics of the natural environment in the polar regions. 3. Understand scientific expeditions in the Antarctic region. 4. Name two...

"Polar Regions" PPT:

"Polar Regions" PPT Part One Content: Introduction of new courses Course standards 1. Understand the special natural environment of the polar regions. 2. Understand the reasons for carrying out scientific expedition activities and environmental protection in the polar regions. 3. Cultivate the concept of sustainable development. 4. Stimulate scientific learning..

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Update Time: 2024-09-13

This template belongs to Geography courseware People's Education Edition Geography for Seventh Grade Volume 2 industry PPT template

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