Knowledge of geographical five areas and contour lines

In a year, the direct point of the sun always goes back and forth between 23 26 north latitude and 23 26 south latitude.

Move it. Only in the area between the Tropic of Cancer and the south can you see the sun shining directly overhead. This area gets the most sunlight and heat in the world, and is called the tropical area.

South of the Antarctic Circle and north of the Arctic Circle, the height of the sun is very small, and extreme days and nights can be observed. The obtained solar heat is very small and the temperature is very low, which is called the frigid zone.

Between the Tropic of Cancer and the South Arctic Circle, the light and heat obtained are between the tropical zone and the cold zone, with moderate temperature and distinct seasons all year round, which is called temperate zone.

The dividing line between the five regions is the Tropic of Cancer and the South Arctic Circle.

Equinox (March 2 1 or so) and autumnal equinox (September 23 or so): The sun shines directly at the equator, but the difference is that after the vernal equinox, the sun moves north, while after the vernal equinox, the sun moves south.

On the solstice of summer (around June 22nd), the sun shines directly on the Tropic of Cancer.

During the winter solstice (around 65438+February 22nd), the sun shines directly on the Tropic of Capricorn.

Contour: a closed curve connecting points at the same altitude on the ground.

characteristic

(1) The elevation of any point on the same contour line is equal.

2 The elevation difference between adjacent contours is equal. The horizontal spacing of contour lines indicates gentle or steep terrain.

(3) Contour lines are continuous closed curves.

(4) Contours generally do not intersect or overlap (except at cliffs).