Middle School Geography Contours, High School Geography Isobars?

c, the contour line is the absolute value of the altitude.

There is a lot of possible terrain in the closed place.

The contour convex high value is low, so it may be a valley in the topographic map.

c Where the contour line is dense, the slope is steep.

This is something that must be remembered. Where contour lines are dense. The slope is steep.

d The contour line protrudes high into the valley.

The place where the B contour line closes is the plain.

The height of the a-contour line may be relative or absolute.

The height of the contour line is the altitude of the elevation.

The place where the contour line closes can be a mountain top or a depression (basin), depending on the value of the contour line.

The slope is steeper where the contour lines are dense, and the slope is gentler where the contour lines are sparse. As you can see from the projection of a mountain peak, you can experiment with plasticine.

Where the contour line protrudes to the heights is the valley, and vice versa is the ridge. You can also use plasticine to pinch out the mountain peaks for experiments.

aRelative height refers to the vertical distance between one point on the ground and another.

b Not necessarily, it depends on whether there is a closed curve in that curve.

c Correct The first floor has already been said.

d is the valley. Specifically, I don't think you have learned it thoroughly.

A link to the library (a courseware) for you.

Let's learn hard

Compare the elevation difference between the two places with a relatively high pair, and b may also be a basin. d is the valley.

Hello, the isobars at 2 places are 1010. First look at the outer ring of the large isobar, the difference between each isobar is 5 atmospheres, and the 2 places in the figure are a separate small area, and the air pressure increases sequentially from the outside to the center, and the increment is 5 atmospheres, so 1010 is selected.

2 can't be 1000, or 1005 or 1010. Since there is no 1005, it is 1010

The outer circle of 1005 rises compared to the outer circle, so the value range of the outer circle of 2 is 1005 1010. So there are only two possibilities for a circle of 2: 1005 or 1010.

An isobaric line is a closed curve on the same horizontal plane (the same horizontal height) that connects those points with equal barometric pressure values; Isobaric surface refers to the surface that connects all points with equal air pressure values in space, in the ideal state, the isobaric surface is parallel to the sea level, the higher the altitude, the lower the barometric value, due to the influence of atmospheric motion and other reasons, the isobaric surface is no longer a uniform plane and becomes a variety of curved surfaces, but the isobaric surface will not cross each other, the higher the altitude, the smaller the value of the isobaric surface.

According to the characteristics of the contour distribution, the gradual change of the values on both sides of any contour line is opposite, with 1005 on the outside and 1000 and 1005 on the outside. Since 1005 is decreasing outward to 1000, 1005 is increasing inward, so the place should be 1010

The higher the altitude, the lower the air pressure. The reason is that the higher the altitude, the thinner the air.

Near the ground is at the same level, and the higher the temperature, the lower the air pressure.

The air pressure near the ground is generally higher than the high air pressure, and the names of the two are opposite, that is, the low altitude is high pressure, and the low pressure near the ground is low pressure.

What is the difference between high school geography isobars and isobaric surfaces? An isobaric line is a closed curve on the same horizontal plane (the same horizontal height) that connects those points with equal barometric pressure values; Isobaric surface refers to the surface that connects all points with equal air pressure values in space, in the ideal state, the isobaric surface is parallel to the sea level, the higher the altitude, the lower the barometric value, due to the influence of atmospheric motion and other reasons, the isobaric surface is no longer a uniform plane and becomes a variety of curved surfaces, but the isobaric surface will not cross each other, the higher the altitude, the smaller the value of the isobaric surface.

Because the two are on the same curve, I really help you look forward to it

Contours at the ridge protrude to the lower part; In the valley, the contour line protrudes to the heights; Where contour lines are dense, the ground slope is large; Where the contour line is sparse, the ground slope is small.

The distribution of contour lines can reflect the surface morphology. The middle high and the low around the closed contour line are the top of the mountain, and the low middle and the high around the middle are the basin; Contour curved nuclei can be used to help memorize valleys and ridges using the mantra "convex high is low, convex low spring wheel is high". The convex low is a ridge, a watershed, and the convex high is a valley, which may have developed a river, and the river flows to a low place; The topography at the intersection of contour lines is a steep cliff; The contour line density reflects the steeper slope and the faster flow velocity of the river.

Plateau: A circle of concentric circles, the closer to the center of the circle marked with a larger value, indicating its higher altitude.

Basin: Same as the map of the plateau, but the values are reversed, representing the low altitude of the center.

Hills: In a region, there are many small contour maps that resemble plateaus, and the values labeled will not differ too much, otherwise they will become mountain peaks.

Mountains: The figure also resembles a plateau, not necessarily circular, within a circle, there may be two or more small circles, representing mountain peaks.

Rice line: Indicates sea level and is also the coastline.

200 meters: plain terrain (sparse contour lines, broad and flat).

500 meters: hilly terrain with a relative altitude of less than or equal to 100 meters.

Above meters: mountainous terrain, relative altitude greater than 100 meters, dense contour lines, and V-shaped river valley turns.

m, 3000m line: reflects the middle mountains and high mountains.

6. Plateau terrain: the altitude is large, the relative height is small, the contour line is very dense at the edge, and the top is obviously sparse.

Rice noodles: reflect the characteristics of the Qinghai-Tibet Plateau and high mountains.

First: greater than the big one, less than the small one.

Second: the convex height is low, and the convex low is high.

Elevation: The vertical distance at a point on the ground above the surface of the sea, which is called the sea level. The sea is also known as absolute height. Return.

Relative height: The vertical distance on the ground that one point is higher than another is called the relative height.

Contour lines: The elevations of each location are marked on the map, and then the points with the same altitude are connected into a line, which is called a contour line.

Bathymetric lines: On the map, lines of the same depth in the ocean are connected, called bathymetric lines.

Characteristics of contour topographic maps:

1.The same line is of equal height, and the same diagram is equally distant;

2.Contours are closed smooth curves;

3.The density of the contour line determines the slope size;

4.Contour lines generally do not intersect or overlap.

Classification of topographic maps:

There are three kinds of common topographic maps, contour topographic maps, contour topographic maps, topographic profiles, which can most intuitively reflect the undulations of the surface is the terrain profile, in the layered color topographic map, usually blue represents the ocean, green represents the plain, and there are five basic types of terrain, namely plateaus, plains, mountains, basins, and hills.

Reading of topographic maps:

1.Determine the elevation of the terrain: the elevation of each point on the same contour line is the same, and the contour distance is equal on the same contour map. The higher the ground, the greater the value; Conversely, the lower the value, the lower the terrain.

2.Judge the steepness of the slope: On the topographic map of the same contour, the denser the contour line, the steeper the slope, and the denser the seabed contour line, the steeper the slope.

The points of the same height, the lines that are connected, are all from the top view, so it is good to build an imagination.

1. There is a direction sign in the question, and the top is the north, draw a direction map like this:

In this way, you can see the flow direction of the ab segment.

2. Are you sure this question is D?

First, use this formula: (n-1)) Contour Relative Height of the Cliff (n+1)) Contour Distance (n is the number of coincident lines at the cliff).

4-1) 50 Cliff Relative Height < 4+1) 50150 Cliff Relative Height < 250

Based on the range of the relative height of the cliff, I think C should be chosen

3. The contour line at the first place is dense, and according to the protruding direction of the contour line, it can be seen that the middle here is higher than the two sides, which can be said to be a ridge, which is not conducive to water storage, and the water is easy to lose, so it is not suitable for building terraces.

The contour next to the river is 50, and the contour line where the river flows must be smaller than 50, otherwise there would be no river, which can determine the direction of the flow, according to the distribution of the contour lines around it.

Question 1 The red arrow at the bottom shows that the child is southeast to northwest.

Question 2 There is a formula for this (n-1) Contour distance The elevation of the cliff (n+1) Contour distance, n is the number of intersections at the cliff.

Question 3 The contour line at B is too dense and is a steep slope, which is not suitable for terraces.

This question is not conditional, and the size of the contour line is missing.

If a>b>c, 2 are ridges, and 1 slope is located on the leeward slope and the sunny slope of the summer monsoon, the growth of Masson pine should be worse; The three slopes are located on the windward slope of the summer monsoon and the sun rises, and the Masson pine grows better.

If the answer to a is that the slope is on the windward slope of the summer monsoon and the masson pine grows better, it should be the latter.

The southeast region of our country is generally hilly, the mountain is relatively small, and close to the sea, it is easy to make the ocean warm and humid air flow enter, regardless of its mountain size and small mountain, it is within the range of the air flow, and the air flow should go over the mountain, in this process, cooling, gathering, the volume is getting larger and larger, to a certain extent, can not stand the pull force falls, there is an arrow in the lower right corner of the figure, that is due north direction, so that 1 is located in the east, is windward. There is a lot of precipitation on the windward slope, and this direction is sunny, the sun is abundant, and the photosynthesis is strong....

The conditions of this question are insufficient, this map is the southeast region, the summer monsoon is the southeast wind, and there is no direction sign for this question, only the direction of the north down the south, the left west, the right east, if 1 is the windward slope, it seems that it does not meet the geographical conditions, there are two situations: if a is greater than b is greater than c, then this figure is a ridge map, that 1 should be a leeward slope, and the growth of Masson pine is poor.

If A is less than B and less than C, then this figure is a valley map, and then 1 should be a windward slope, Chaoyang, and the growth of Masson pine is good.

I also feel that the conditions are insufficient, and the north and south are not marked, so it's hard to say.

There is a contour line between 50 and 40 on the left, and the height difference between any two adjacent contour lines on a map is equal, so the middle line is 45, and the contour distance of this map is 5, because the river flows from high to low, it can be seen that the northwest is high, the southeast is low, and the lower right corner is the lowest, we go down along the 40 contour line, the city is 35, and then the lower one is 30, and the right one is 25, so the height of the area in the lower right corner must be less than 25, greater than 20, and the interval is (25, 20), Count from 25 to the top along the contour line on the right, and add 5, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 to the top, then the highest place is higher than 80 and less than 85, the interval is (80, 85), and the maximum height difference is infinitely close to the difference between the maximum value of these two intervals (25, 20) (80, 85) and the minimum value: 85-20 = 65, but it will not be equal to 65, and less than 65Find the answer closest to 65 and less than 65 in the answer.

If you don't understand, you can ask.

The denser the contour line, the steeper the terrain. The overlap is a mountain cliff.