High School Geography Earth Motion, High School Geography Earth Movement Problems

The day in place A is 10 minutes longer than that in place B, and latitude A is higher than that of B, which is summer in the Northern Hemisphere, and the sun shines directly on the Northern Hemisphere 12-day length 2=sunrise time; 12 + day length 2 = sunset time

Assuming that the daylight length in A is 12 hours and 20 minutes, and the day length in B is 12 hours and 10 minutes, the sunrise time in A is 5:50 local time and the sunset time is 18:10 local time. The sunrise time is 5:55 local time and the sunset time is 18:05 local time. There is a 1° longitude difference between A and B, and time B is 4 minutes ahead of A.

The sunrise time in place A is 5:50 a.m., and the time in place B is 5:54 a.m. The sunrise time in B is 5:55. This means that when the sun rises at 5:50 in place A, the sunrise in place A is at 5:54 in place B, and the sunrise in place B itself is at 5:55 in the local area, and for place B, the sunrise in place A is one minute earlier than in place B. Sunset time:

It is 18:10 in place A, 18:14 in place B, and the sunset time in place B is 18:05 in place, which means that when the sun sets at 10:05 in place B, there is no sunset in place A, and the sunset in place A is at 18:14 (that is, at 18:10 time in place A), which is 9 minutes later than the sunset time in place B.

1. The range of the eastern hemisphere is 20°W--160°E, that is to say, the westernmost meridian is 20°W, and the easternmost meridian is 160°E, understand?

2. On the equator, there is always a dichonox, that is, sunrise at 6 o'clock, sunset at 18 o'clock, the morning line is the place of sunrise, that is, the point where the morning line intersects with the equator is 6 o'clock, and the evening line is the place of sunset, that is, the point where the dusk line intersects with the equator at 18 o'clock.

3, BA is the dusk line, that is, point A is 18 points, the meridian line where point B is located and the meridian line where point A is located is 90 ° (the difference between every two meridians in the figure is 30 °), the difference is 6 hours, and the calculation of local time is based on the principle of east plus west subtraction, that is, 12 o'clock.

It's clear that the days are short and the nights are long.

Aha, that's the same old question. I've done many, many times.

10.It has already told you that b is the morning and dusk line, and m point is the maximum latitude value on the line. Imagine that the place where the latitude of the morning and dusk lines is the tangent between the morning and dusk lines and the latitude line (i.e., the latitude where the polar day and night just occur), and the question stem is the lowest latitude and is in the Northern Hemisphere.

Think about it, what is the lowest degree in the Northern Hemisphere where there is a polar day and night?

11。At this point, the Northern Hemisphere summer half is shown with an R-point of 30°E. The implicit information is that 30 degrees to the left of point R is the prime meridian, and 30 degrees to the left is 30 degrees west longitude, that is, point q is 30 degrees west longitude.

At this time, the QR arc is the night hemisphere (the days are longer and the nights are shorter in the second half of the northern hemisphere), and if you push it one step further, you can see that the M point is 0. (You can draw a top view of the polar region in the northern hemisphere in the summer half of the year to help with the problem) From this, it can be seen that 30 degrees east longitude is 2 o'clock, and 120 degrees east longitude of Beijing is 8 o'clock.

The diagram given in this problem is more abstract, the key to solving the problem is the transformation of information and graphics, you can try to convert it into a side view, the m point is actually the lowest latitude of the morning and dusk line tangent to a certain circle of latitude in the northern hemisphere.

Question 10, if the latitude of the m value is to be the lowest, it must be at the polar day and night, and the northern hemisphere polar day is the range of the value of the m point'90, so the lowest should be option B.

In the second question, the place of the meridian where the M point is located is 12 o'clock, and Q and R are 60 degrees apart, so P and M are 30 degrees of longitude apart, with a difference of two hours, so the place time of P and R is 14 o'clock, and the longitude of the R point is 30 °E, and the meridian to be calculated in Beijing time is 120 °E, and the time interval is 6 hours, so Beijing time should be 14 minus 6, which is eight o'clock, which is the B answer.

You see, can you understand that?

Because the world is divided into 24 time zones, with a maximum difference of 24 hours, i.e., the East Twelve and West Twelve regions, there are at most two dates on Earth.

There are two date lines on Earth. One is the 180-degree meridian (this one is fixed) and the other is the one when the local time is zero (this one is constantly changing).

The time of a known time zone is found in another time zone.

It's 10:10 on September 10 in New York, what time is it in Beijing?

Beijing, East 8th District, New York, West 5th District (East Positive, West Negative).

Time asked = time given - (time zone given time - time zone sought) Note: If the difference is less than 0, add 24 but the date should be 1 day earlier; If the difference is greater than 24, subtract 24, but add 1 day to the date. Points remain the same.

Your algorithm is a bit difficult to understand.

According to Beijing's east of New York, there are 13 time zones that the time is.

Based on Beijing's west of New York, there are only 11 time zones.

The time is 10:10 + 24:00-11:00 = 23:10 There is also a change in the date that crosses the date line, which is difficult to understand.

Actually, the result is the same, I'm going to proctor.

There are a total of 24 time zones

According to the calculation of Beijing in the east of New York, the number of time zones you have one by one is 13!

If you calculate according to Beijing's time zone west of New York, the number of time zones is 11, how can you still subtract 13, shouldn't you subtract 11?

1.As can be seen from the figure, the earth rotates clockwise, and according to the principle that the north is against the south and the south is hidden, it can be known as the southern hemisphere.

2 Known. NO and MO must be a morning line and a dusk line, SP and sq are absolute and relative date lines, and the relative date line must be bisected by the morning and dusk lines, then only when SP is a relative date line (0:00 meridian) will be bisected between the morning and dusk lines (sq must not be divided by the diagram), so the SP side is the night hemisphere, and NO changes from night to day with the rotation of the earth, so it is the morning line.

3 Because in 2, it can be seen that sp is the absolute heliological boundary, then sq is the relative heliological boundary (180 degrees longitude), then it can be seen from the earth from west to east, p is 120 degrees west of the 180 degree meridian, so it is 60 degrees west longitude

1.This is a top view of Antarctica, 2Look at the direction of rotation of the earth, 3Or look at the direction of rotation of the earth,

Mon is the morning and dusk line, QS and PS are the two date boundaries - 180 degrees longitude and 0 hour longitude; The meridian coil composed of the 0 hour meridian and the 12 hour meridian must be too early and dusk to fight O, according to which it is judged that QS is a 180-degree meridian and PS is a 0 meridian, so the morning and dusk line.

On the right side of the mon is night, and on the left is day.

1.In this picture, the earth rotates clockwise, which can be known as the southern hemisphere; Therefore, it is judged that the polar night phenomenon occurs in Antarctica.

2.According to the direction of the earth's rotation, the dusk line from day to night is the evening line, and the morning line from night to day is the morning line, so it is judged that no is the morning line.

is a 180-degree longitude, minus 120 degrees to the east is 60 degrees west longitude (decreasing to the east or increasing to the west is the west longitude, and vice versa is the east longitude).

1.Clockwise, for the South Pole, the Earth turns from west to east. (The direction of the arrow is east).

2.It is known that mon is the morning and dusk line, 0n is 6:00, and om is 18: all the above is night, and all the bottom is 100 days. The Antarctic Circle is on top, so the polar night phenomenon occurs.

3.The shaded part seems to be the 6th day (I can't see clearly), then the non-shaded part is the 5th. It is known that the P line and the Q line are two date change lines, and the date change line must be 0:

00 or east longitude is 0:00, Q line is east longitude 180, so the extension line of Q line is 0° east longitude, the direction of the arrow is east, and the opposite is 60°, which is exactly 60° west longitude.

This part of the content is more abstract and involves calculations, so when solving the problem, you should keep your thinking clear, and you can list the known conditions next to it when solving the problem, for example, when encountering a polar projection light map, you must first determine which hemisphere it is, which solar term it is, so as to get the direct point of the sun, and find [sharp] four important meridians in the diagram (The meridian of sunrise and sunset on the equator, the **meridian of the day hemisphere, and the **meridian of the night hemisphereThese four meridians are important times. The most important thing is to listen carefully in class and master problem-solving skills. Do more practice questions after class, and the practice is best to have [teach] the answer analysis.

Learn to generalize, learn to set mistakes. Another important point in learning geography is to combine and learn to read maps.