Geography how to judge the morning line and the dusk line, geography. Morning and dusk lines How to

1. According to the rotation of the earth.

Direction judgment: the dividing line that follows the direction of the earth's rotation and transitions from the day hemisphere to the night hemisphere.

It is the dusk line, and the dividing line from the night hemisphere to the day hemisphere is the morning line.

2. According to the judgment of the day and night hemisphere: the dividing line between the western edge of the day hemisphere and the night hemisphere is the morning line, and the dividing line between the eastern edge of the day hemisphere and the night hemisphere is the evening line. On the equator, the morning line is at 6 o'clock local time, and the evening line is at 18 o'clock.

The simple ways to tell the morning line and the evening line are:

1. Rotation method:

Rotate along the Earth.

The direction from the night hemisphere into the day hemisphere is the morning line, and from the day hemisphere into the night hemisphere is the dusk line.

2. Time method.

The intersection of the morning line and the equator is 6 o'clock, and the intersection of the dusk line and the equator is 18 o'clock.

3. Orientation method.

The west side of the night hemisphere is the evening line, the east side of the morning line, and the west side of the day hemisphere is the morning line, the east side of the evening line.

The prerequisites for judging the morning line and the dusk line are the direction of the earth's rotation and the distribution of day and night: along the direction of the earth's rotation, the east of the morning line is the day hemisphere; To the east of the dusk line is the night hemisphere.

How to distinguish between morning and dusk lines:

1. On the sunshine chart, the method of judging the morning line and the dusk line is based on the direction of the earth's rotation: along the direction of the earth's rotation, the dividing line from the day hemisphere to the night hemisphere is the dusk line, and the dividing line from the night hemisphere to the day hemisphere is the morning line.

2. Second, according to the judgment of the day and night hemisphere: the dividing line between the western edge of the day hemisphere and the night hemisphere is the morning line, and the dividing line between the eastern edge of the day hemisphere and the night hemisphere is the dusk line.

3. On the equator, the local time is 6 o'clock is the morning line, and 18 o'clock is the dusk line.

Interpretation of the morning line and the evening line:

The morning and dusk lines are characterized by being perpendicular to the sun's rays and always bisecting the equator.

Method (1): The boundary between the day and night hemispheres - the morning and dusk line, the line that follows the earth's rotation from the night hemisphere to the day hemisphere is the morning line, and the line from the day hemisphere to the night hemisphere is the dusk line.

Method (2): Use local time to determine the morning line and the evening line. Because the equator has the same length of day and night throughout the year, from the perspective of local time, it is 6 o'clock sunrise and 18 o'clock sunset, if the place where the morning and dusk line intersects with the equator is 6 o'clock, it is the morning line; If it is 18 o'clock, it is a dusk line.

Morning line and dusk line, how to judge, you know.

Think about it clearly: what is "morning" and what is "dusk", then go back to the map, use the "map" you see as a globe, find the poles, and compare the movement of the earth "from west to east", the morning and dusk line is not so difficult!

Morning and dusk line judgment method: to a rectangular chart.

That is, the kind of picture sent upstairs) as an example, determine the direction of the map to go up north and down south. (If not, find a way to convert the graphics to up-north-down-south).When the day is in the middle, the morning line is on the left and the evening line is on the right; When the night is in the middle, the left is the dusk line and the right is the morning line.

Take a side view (like if you were looking up at a globe.)

The same) as an example (the default is up north and down south), if the left is dark and the right is day, you can see the morning line; Day on the left, night on the right, you can see the dusk; All daylight, left morning and dusk; All night, left and right morning. Take a top view (from above or below) as an example, looking down on the Northern Hemisphere from daylight clockwise to the morning line and counterclockwise to the dusk line; Looking down on the Southern Hemisphere, it reaches the dusk line clockwise from daylight and counterclockwise to the morning line. Polar Day.

There is no sunrise in the ordinary sense, and the sunrise of the polar day refers to 0:00 on the same day, such as in the Northern Hemisphere, the direction is due north; Southern Hemisphere, due south.

<> the boundary between the day and the night hemisphere is the morning and evening line, as shown in the figure above: that is, the alternation line between day and night. Based on the analysis of a certain moment of rest, it can be subdivided into morning line and dusk line.

1.Morning line: The boundary line that turns from night to day (the meridian represented by the solid line facing directly in the diagram).

The local time is 6 o'clock. 2.Dusk line:

The boundary line from day to night (the dotted part of the boundary in the middle of the picture), also refers to the eastern half of the solitary line of the morning and dusk circle. Local time is 6 p.m.

Hope it helps!

Morning line and dusk line, how to judge, you know Hongzhen Qichang.

The dividing line from the night hemisphere to the day hemisphere is the morning line, and the place where the intersection of the morning line and the equator is located is 6 o'clock in the morning;

The dividing line from the day hemisphere to the night hemisphere is the dusk line, and the place where the intersection of the dusk line and the equator is located is at 6 p.m.

Then, according to the difference in longitude represented on the map, you can determine the time of a certain place.

Judging by the direction of the Earth's rotation, the change from night to day is the morning line, and vice versa.

From day to night is the dusk line, and from night to day is the morning line.

If you look at it from the shadow map, it is very straightforward, and if you do not draw a shadow and only draw a line, you have to judge it by referring to the direction of the earth's rotation and other knowledge.

On the diagram, along the direction of the Earth's rotation, the line that passes from the day hemisphere into the night hemisphere is the dusk line, and the line that passes from the night hemisphere into the day hemisphere is the morning line.

To the east of the morning line is day, and to the west is night.

To the east of the line is night, and to the west is day.

Following the direction of the Earth's rotation, entering the day hemisphere from the night hemisphere is the morning line, and entering the night hemisphere from the day hemisphere is the dusk line.

Hope it helps.

The earth is from west to east, from night to morning is the morning line, from the morning to the night is the dusk line.