"Earth and Globe" Earth and Map PPT Courseware 5

Description

"Earth and Globe" Earth and Map PPT Courseware 5

Understand the shape and size of the Earth

The sky is round and the earth is like a disk

Earth satellite photos Magellan's circumnavigation route map

size of earth

Average radius 6371 kilometers

The maximum circumference is about 40,000 kilometers

The earth’s surface area is 510 million square kilometers

Moreover, the earth is also an irregular sphere.

Model of the Earth - Globe

In order to make it easier to understand the earth, people imitated the shape of the earth and reduced it to a certain proportion to make a model of the earth - a globe. There is no deformation of length, area, direction, or shape on the globe, so observing the relationship between various scenery on the globe is holistic and approximately correct.

latitude and longitude

Earth's axis The Earth's axis of rotation, which does not actually exist.

North Pole The point where the northern portion of the Earth's axis intersects the Earth's surface.

Meridian A semicircle connecting the north and south poles and intersecting the parallels at right angles.

Lines of latitude A circle that is perpendicular to the Earth and goes around the Earth. The equator is the longest line of latitude.

Antarctica The intersection of the southern segment of the Earth's axis with the Earth's surface.

Understanding of parallels

weft:

1. Shape: circle.

2. Number of items: countless items.

3. Direction: point to something.

4. Length: The longest latitude - the equator.

Division of high, middle and low latitudes

High latitudes: 60° to 90° north and south latitudes

Mid-latitude: 30°-60° north and south latitude

Low latitude: North and South latitude 0° - 30°

understanding of longitude

warp:

1. Shape: semicircle.

2. Number of items: countless items.

3. Indicate direction: indicate north and south.

4. Length: All meridians are equal.

Jingwei.com

On a globe or map, longitude and latitude lines are intertwined to form a grid of latitude and longitude.

Using the longitude and latitude marked on it, various locations, regions and various geographical locations on the earth's surface can be determined. It is very useful in military, aviation, navigation and other aspects. For example, ships sail on the vast sea, and airplanes fly in the vast sky. No matter where they go, people can use instruments to accurately measure its longitude and latitude, thereby determining its location.

practice practice 2

Xiao Ming received a letter from an American kid named Jack. Jack made a little joke in the letter, inviting Xiao Ming to participate in summer camp activities at a longitude of 116° and a latitude of 40° during the summer vacation. Where is the location mentioned in the letter? Please look for this place on the globe and see if there are any errors.

Answer: The location of Jack cannot be determined. The Czech Republic may be at 40°N, 116°W; 40°N, 116°E; 40° S, 116°E; 40°S, 116°W.

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For more information about the "Earth and Map Earth and Globe" PPT courseware, please click the Earth and Map ppt Earth and Globe ppt tag.

"Earth and Globe" Earth and Map PPT Courseware 7:

"Earth and Globe" Earth and Map PPT Courseware 7 The Shape of the Earth Humanity's exploration of the shape of the Earth continues the process of understanding the shape of the Earth for thousands of years. In the fifth and sixth centuries BC, ancient Greek philosophers started from the concept of the perfect sphere and believed that The earth is spherical. ..

"Earth and Globe" Earth and Map PPT Courseware 6:

"Earth and Globe" Earth and Map PPT Courseware 6 1. Shape and Size of the Earth 1. Shape of the Earth Observe the picture on the right, what is the shape of the Earth? The Earth is an irregular sphere with slightly flattened poles and a slightly bulging middle. 2. Size of the Earth The average radius of the Earth..

"Earth and Globe" Earth and Map PPT Courseware 4:

"Earth and Globe" Earth and Map PPT Courseware 4 Shape characteristics of latitude lines: circle (except the two poles) Indicating direction: east-west direction Length characteristics: the equator is the longest, gradually shortening towards the north and south poles Degree range: 0~90 Degree change pattern: from the equator to the north and south poles The North and South Poles are gradually increasing...

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Update Time: 2024-11-20

This template belongs to Geography courseware People's Education Edition Geography for Grade 7 Volume 1 industry PPT template

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