A few geography questions in the first year of junior high school are troublesome to solve

Question 1: There is only one 180-degree longitude. It can be called east longitude 180, or it can be called west longitude 180...

The east side is the west longitude.

Question 2: The lower the latitude of the place, the larger it becomes. Description is south of the equator (the equator is 0 latitude).So the southern latitudes.

The longer the longitude goes to the right, the greater it becomes. And within 160 degrees. for the east longitude.

Question 3: Comparison can be seen. There are fewer countries that cross the meridians, so you don't want your country to have two dates a day! ( International Date Line will avoid this phenomenon and change the bend).

Question 4: Nautical chart, know your location (specific latitude and longitude), know the latitude and longitude of the accident, the shortest distance method. on the globe and then follow the direction of the voyage. (Where to go first, then to whom).

One West Longitude.

Latitude south longitude east.

There are fewer countries to pass through, and two days in one country are avoided.

GPS, radar.

One: 1, west longitude.

Two: East 100, South 30

Three: Because there are few countries to cross, mainly the ocean, it is convenient for international exchanges.

Four: You can't learn this, right? But I'll tell you that theodolite, GPS, sextant, all can be.

Question 3: To maintain the integrity of Europe and Africa.

Equinox time Position of direct sun point Four-season division Day and night length.

The vernal equinox, the equator, the spring, and the global day and night are of equal length.

Summer Solstice Tropic of Cancer Summer The days are long and the nights are short in the Northern Hemisphere, and there is a polar day phenomenon in the Arctic Circle.

Autumnal equinox, equator, autumn, and the length of day and night are equal to the globe.

Winter Solstice Tropic of Cancer Winter The days are long and the nights are short in the Southern Hemisphere, and there is a polar day phenomenon in the Antarctic Circle. a

The 0° longitude is the starting point for calculating the east-west longitude. The prime meridian, also known as the "first meridian" or "zero meridian", is the starting meridian on the earth to calculate longitude. The formulation and use of the prime meridian is subject to change.

Prior to the 19th century, many countries adopted the meridian route through Hierro Island, a Canary Islands in the Atlantic Ocean. That meridian corresponds to today's 17°39 46 west longitude. In the first half of the 19th century, many countries used the meridian passing through their main observatories as the prime meridian.

As a result, there were several prime meridians in the world at the same time, which brought many inconveniences to later navigation and geodetic surveys. Therefore, in 1884, the International Longitude Conference decided to use the meridian of the Greenwich Astronomical Eri Globe in England as the prime meridian as the starting meridian of the global longitude. The longitude value starts from the prime meridian and is measured to the east and west, respectively, at 0°-180° or 0-12° respectively.

The east of the prime meridian is east longitude and the west is west longitude, and the global longitude measurement is based on the intersection point e of the prime meridian and the equator as the longitude origin. After 1957, the Greenwich Observatory moved to the site of the observatory, and several observatories with good long-term stability were used internationally to maintain the longitude origin, and the original longitude of these observatories was used to reverse the longitude origin of their respective longitude. The point that is the origin of the global longitude is determined and maintained by the difference between the mean of these longitude origins and the difference between point e.

In 1968, the origin of the International Agreement (CIO) was used as the origin of the Earth's poles, and the meridian passing through the origin of the International Agreement and the origin of the longitude of the average observatory was called the "prime meridian". The longitude zeros of the earth coordinate system determined by various new technologies are as consistent as possible with the prime meridian, but there is often a zero difference of less than 1.

The answer is: c d b

Flip over the back and see the answers.

cBecause the mode of transportation of dog sleds determines that there must be snow here, otherwise this mode of transportation cannot be used, since there must be snow here, then it must be a very cold place, and secondly, the "northernmost inhabitants" are also mentioned in the stem.

From the perspective of this question, it is intended to examine the impact of climatic conditions on transportation modes, and the other two answers are different.

The northernmost inhabitants have a cold climate.

Answer: c The climate is cold.

Reason: Dogs are more likely to survive in the snow.