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1. High and low pressure can only be compared on the same horizontal plane, and it is meaningless to compare different heights.

For example, in the vertical direction, the air pressure below must be higher than the above, just like a stack of books, and the pressure on the bottom must be greater than the pressure on the top, but we can't say that there is high pressure below and low pressure above, because high and low pressure can only be compared at the same height (analogous to the same book).

2. At the same height, we assume that in the initial stage, the atmosphere is uniform (like a book, the whole surface is smooth and uniform without difference).

Taking the near ground as an example, due to the uneven distribution of the sun's rays, the difference between cold and heat in different regions, the air in the heated area expands and rises, the air flow flows upward, and the air pressure becomes lower (only compared with other places near the ground, not with the upper altitude). In cold places, the air shrinks and sinks, the air flow flows downward, and the air pressure becomes higher (the same reason). As a result, near the ground, the air is no longer uniform, resulting in a difference in air pressure, and a horizontal pressure gradient force is generated between high and low pressure, which is the initial force of the wind, and the high pressure points to the low pressure.

3. The horizontal movement of air is called wind, and the vertical movement is called air flow (updraft, downdraft).

High pressure and low pressure refer to air pressure, and the movement of air is produced by the action of force. In addition to gravity, there are also pressure gradient force due to uneven pressure distribution, geostrophic deflection force due to the rotation of the earth, friction force due to the relative motion between air layers and between air and ground, and inertial centrifugal force due to curvilinear movement of air. The different combinations between the horizontal components of these forces make up the different forms of horizontal motion of the atmosphere.

The horizontal direction is called horizontal movement, and the vertical direction is called vertical movement.

1, two levels (Earth-Moon system and solar system), the central celestial body is the Sun 2, 2 is Mars, 3 is Jupiter; Small mass and small size.

3. Near-circularity, on the same plane, meaning: the orbits of the planets do not affect each other, forming a safe and stable cosmic environment.

4. Peculiarity is the only planet in the solar system that has life.

Conditions: Moderate distance between the sun and the earth, providing a suitable temperature; the presence of liquid water; moderate volume and mass, forming an atmosphere.

1 includes first-order celestial systems; The central celestial body is the Sun.

2 The planets connected to the asteroid belt are Mars and Jupiter; It has the characteristics of small volume and small mass, and the direction of 3 revolutions is isotropic; Almost on a plane; The significance of this is that the orbital plane of the planet around the Sun is coplanar.

4 On this planet, the sun rises in the west and sets in the east; The basic conditions are not known.

In addition, this diagram should be wrong, if the Beijing Olympic Star is located in the asteroid belt, there are 4 planets between the Sun and the Beijing Olympic Star: Mercury, Venus, Earth, and Mars, and this diagram has only two planets.

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w3, c, the sun shines directly at the 0 equator.

4, a, the smaller the scale, the larger the display range, 5, d

aMid-ocean ridge (also known as the ridge) The ocean grips the stool of the section generated by the collapse brigade plate, and expands to both sides, only it is.

The trench is the source of the demise of the large plates.

C, A is the seafloor extrusion, B, about the plate, it has nothing to do with the seafloor expansion, D is volcanism, and E is the plate subduction is a ** zone.