Solve high school geography problems with a master! Geography basic questions in the first year of h

First of all, let me say that rice is mainly concentrated in the Asian monsoon region. It has the following characteristics:

1.Smallholder farmer operations.

2.The yield per unit area is high, but the commodity rate is low.

3.The level of mechanization and technology is relatively low.

4.The amount of water conservancy projects is large.

Smallholder farmer operations. Rice production is based on households, due to the small amount of cultivated land per capita, each household cultivates very little land, and the area of rice cultivated by each household in southern China is generally less than 1 hectare;

The yield per unit area is high, but the commodity rate is low. Farmers work intensively in the fields, resulting in a higher yield per unit area of paddy. However, due to the small scale of production, the total output of rice per household is not large, and restricted by the traditional concept and economic level, farmers keep a considerable part of the rice harvested for their own use, and the rice sent to the market is limited;

The level of mechanization and technology is low. Farmers are generally engaged in manual labor, although in the past one or two decades, the use of electricity for irrigation, threshing, etc. has developed rapidly, and the use of chemical fertilizers and pesticides has gradually increased, but on the whole, the level of mechanization and science and technology is still relatively low; With the exception of Japan, which has made great progress in the mechanization of paddy fields, the level of mechanization of rice production in other Asian countries is still very low.

The water conservancy project is large. Irrigation is the basis of rice production. Floods and droughts are frequent in the monsoon area, which poses a great threat to rice production. Small-scale farmers are unable to build water conservancy projects, and need to invest heavily and organize the construction of water conservancy projects;

4.In addition to Asia, there are also rice cultivation in Egypt, Nigeria in Africa, Spain and Italy in Europe, Cuba, Venezuela and Brazil in Latin America, and large rice fields in the lower Mississippi River in the United States, but they are produced using large-scale dryland direct seeding technology.

Because the longitude of the earth has radians, the lower the latitude, the greater the arc, that is, the greater the distance between the two meridians, and the 200 meters to the east is at a higher latitude.

The 200 meters to the west are at lower latitudes.

So: on the map, the higher latitudes have more longitude spans, the lower latitudes have fewer longitude spans and the same longitude corresponds to the Earth's.

The number of meters is the same, so after going south, you can't cross so many longitudes from the original, and the longitude will change, and the north-south latitude of this question can return to the original dimension, so it is eastward, not back to the origin.

I won't ask again!! 】

The higher the latitude, the shorter the distance between the two meridians, the shorter the distance between the two meridians, the shorter the distance between the two meridians, the answer is in the east, because the longitude to the east is more than the longitude to the west, so a circle back is above the east.

To go due south and north is to follow the meridian.

Walking due east and west is following the parallel.

So although the distance to the east is the same as the distance to the west, the longitude spanned is different, so the end point is due east at point m.

In fact, this question is clear at a glance through the globe.

The reason why it is not visible on the map is because there is a deviation in the latitude and longitude lines on the map.

I've got a picture for you.

First, walk 200 km east to point M1, 200 km south to point M2, 200 km west to point M3, and 200 km north to point M4, which is located due east of point M. As shown in Fig.

Second, to go east at point M is to follow the 60°n line (the latitude line indicates the east-west direction) to reach point M1, and to go south from point M1 is to follow that meridian line (the meridian line indicates the north-south direction), and so on, to get point M3, point M4.

Third, when you learn the latitude and longitude, you should have learned that the latitude is a concentric circle, but the size and circumference are different, so the latitude where M2 and M3 points are located is different from the circumference of 60°N (that is, the latitude where M, M1, and M4 are located). You think it's back to square one, because you imagine two parallels of straight length.

Note that the latitude and longitude lines can sometimes be imagined as straight, but here they must be imagined as arcs.

So, the distance of the m1 point on the way = the distance of the m2 m3 point.

So, got it? If there is anything you don't understand, I'll explain.

Another: Actually, geography is very easy to learn, as long as you master certain methods. In physical geography, this kind of problem is the easiest. It's okay if you don't understand it now, but after you figure it out, you'll understand it later. Similar to this kind of question, if you follow an arc, it is much more difficult than this.

The southeasterly wind prevails in the northern part of the Australian continent in winter (July), which belongs to the southeast trade wind, and is located in the southeast trade wind belt. The northwesterly winds that blow in summer are caused by the seasonal movement of the pressure belt wind belt.

1.The difference between land and sea heat is the main reason for the formation of monsoon climate, but it is not the only reason, and the seasonal movement of air pressure and wind belt is also an important factor in the formation of monsoon climate.

2.The reason for the formation of the savannah climate is that the equatorial depression zone is controlled alternately by the trade wind belt.

The northern part of Australia has a savannah climate, and in January, it is affected by the seasonal movement of the pressure belt and the wind belt, and the northwest wind blows; In July, due to the difference in the thermal properties of land and sea, southeast winds blew.

The southeasterly winds prevail in the northern part of the Australian continent in winter (July), which belongs to the low-latitude southeast trade wind belt of the Southern Hemisphere. The northwesterly winds that blow in summer are caused by the seasonal movement of the pressure belt wind belt.

The flood season is the time of the year when the water level of rivers is high, generally in the summer (except in Mediterranean climates and temperate oceanic climates), which is called summer flood, because this is the time of year when precipitation is at its highest. There is also a spring flood in the Gaowei area, which is due to the increase in the water level of the river due to the melting of ice and snow in spring, which is also a flood season. As the name suggests, the ice period is the period when the river freezes, generally only in the winter of the middle and high regions, and sometimes with the beginning and end of the ice period, there will be a flood phenomenon, which appears in the river flowing from low latitude to high latitude, because the downstream of this river due to the high latitude, first freezes upstream and then melts upstream, resulting in the blockage of the river channel, and the river overflows to form a flood.

The larger the flow, the stronger the impact of the river, the easier it is for sediment to enter the river, resulting in an increase in the sediment content of the river. As for the flood season and river recharge: in the dry season, the river is only recharged by groundwater, and there is no flood season; During the rainy season (and the spring flood mentioned above in some areas), the river is fed by rainwater, and the amount of recharge is large, so that the flood season is formed.

In fact, what your teacher said is not comprehensive, what is really related to the flood season of the river is precipitation and ice and snow meltwater, and you should find the answer by yourself when studying liberal arts, and dare to deny it! Because after learning a lot of things, students are more accurate than the teacher, many teachers just look at the answers, take away the answers, they are better than us! This is especially evident in politics class!

The flood season is the time period when the river flow is the largest every year, generally the flood season in the south is longer than in the north, and the freezing period is the time period when the river freezes every year, and the ice period in the north is longer than in the south.

The flow is related to the geographical location of the water, the width of the river, the local climate and a variety of factors, the sediment content is related to the climate, geology, etc., because the Yellow River has the loess plateau in the upper reaches, and it is a warm temperate monsoon climate, the precipitation is abundant, and the sediment content of the rain is large.

The flood season is related to the recharge of the river, the more the recharge, the longer the flood season, and vice versa, the river recharge has precipitation recharge, groundwater recharge, etc., the more water recharged to the river, the greater the amount of water in the river, the longer the flood season, and vice versa.

It should be very clear, read more of the teacher's notes, or read more of the geography knowledge point manual).

The flood season, simply put, is the increase in the amount of water. The ice period is when there will be ice in the winter. Flow The sediment content is related to the vegetation cover in the watershed. and there is a positive correlation.

The relationship between the flood season and the river: the increase in the amount of water during the flood season is caused by the river's supply source. For example, melting snow and ice, atmospheric precipitation, etc., a few cases are related to groundwater.

Ice periods are related to latitude seasons. Occurs in winter at higher latitudes.

Water level, flow magnitude and its seasonal variations.

Determined by precipitation. In summer, there is abundant precipitation, the flow of the river increases greatly, and the water level rises, and in the winter, the precipitation seconds reduce the volume of the river and the water level decreases. The seasonal variation of precipitation is large, the seasonal variation of river flow is also large, and the length of the flood season is also large.

The rainy season starts early and ends late, and the river flood season is long. The rainy season starts late and ends early, and the river flood season is short.

The size of the sand content.

It is determined by the vegetation cover and soil conditions. The vegetation cover is poor, the soil is loose, and the river has a large sediment content. On the contrary, the sand content is small.

Whether there is an ice period.

It is determined by the minimum temperature in the basin. The average monthly temperature is below 0, and the river flow velocity is above 0.

Determined by the topography, the drop is large, the flow velocity is large, the terrain is flat, and the water flow is slow.

c. Convert the original map to a top-down view over the North Pole, and the conclusion can be clearly seen.

Connecting the North Pole with C at the equator at A, it is obvious that the longitude difference between AB is less than 45 degrees, so the difference between A and B is less than 3 hours.

Because the time difference is related to longitude, let's look at the problem in terms of longitude.

The longitude spanned by the morning line is 180 degrees.

If we take into account the most extreme case, it is also an impossible case: when the morning line coincides with the equator, the difference in longitude between ab is three hours, which is the maximum.

So all the rest of the time it's less than 3 hours.

So choose item C.

Select C. The next post looks at 13 and 16 floors on it. Hope you understand.

What Ioria replied that you can't understand can be understood in this way. When point C is approaching the North Pole (that is, the equinox), AB will gradually approach, so that the time difference in AB will be close to 0 hours. Got it?

The following figure is a diurnal graph of the solar height of the whole day on the summer solstice in a place. The geographical coordinates of the place are (, 120°E).

120°e120°e

116°e120°e

On the summer solstice, the sun shines directly at 23°26 N;

In the figure, the height of the sun is the highest at 12 o'clock Beijing time, that is, 120 ° E is 12 o'clock, so the sun shines directly at 120 ° E, that is, the place is 120 ° E; At 0 or 24 o'clock, the minimum height of the sun is 11°43, and the latitude of the place can be calculated by the formula of the solar altitude angle at 0

11°43 latitude +23°26 90° latitude 78°17 na.

Choose c The highest solar altitude of the day is 12 o'clock local time, and the highest solar altitude of the day is 12 o'clock Beijing time (120 ° E local time), so we know that the longitude of the place is 120 °E, and the solar altitude of the place is greater than 0 ° all day on the summer solstice, that is, the polar day occurs, and only the polar day occurs in the Arctic Circle on this day.

First of all, determine the type of diagram: the front is a part of the top view, and the latter is a part of the side view deformation.

Then the direction of rotation is judged according to the law of longitude change: east longitude increases to east (i.e., direction of rotation); West longitude increases westward and decreases eastward (i.e., in the direction of rotation). Therefore, the previous figure is clockwise according to the 180° and 90°W rotation directions, and the figure is a bird's-eye view of the southern hemisphere; The right direction of rotation in the back figure is the direction of rotation (to east), so the east longitude in the figure is in the figure; Needless to say, latitude, right?

In the first question, try to draw two points of AB into the same diagram, and judge the direction according to the latitude and longitude. If your logical thinking is okay, you don't need to draw pictures. For example, according to the map just read, it can be seen that A is in the southern hemisphere and B is in the northern hemisphere, then B must be in the south of A, and the two options will be ruled out immediately.

The ABCD option of the second question should first determine the approximate geographical location of the two places according to the latitude and longitude (not looking at the map), and then combine the knowledge of ocean currents, climate, rotation and revolution. It's not a matter of saying it in one or two sentences, depending on how well you base your knowledge. If you don't have a clue, ask your geography teacher.

Question 1 C Question 2 B

First of all, we have to make sure that the previous picture is a top view from the sky over the South Pole, and the person who went upstairs said it as if they didn't say it, and note that it is over the South Pole, so you can make sure that point A is (180, 60s) and point B is easy to identify, because like a normal map, you have already marked point B correctly (70e, 0), so after you have determined it, if you are familiar with the map, it is best if you are not familiar with it, refer to the reference map, and you will know the location of the two points as soon as you look for it, and the problem becomes very simple.