What are the weather phenomena in geography exams?

Experience: 1, changes of weather, air pressure, temperature and precipitation before and after cold and warm front crossing, precipitation: air pressure before and after cold and warm front (cold: air pressure from low to high, warm front is opposite), etc.

2. Typhoon, before and after the typhoon transits, the air pressure, wind direction and precipitation change. Something will draw or point out the wind direction for a city. This kind of problem is very simple: make a vertical line from low pressure to high pressure, and then deflect according to the deflection force.

3. Judging the temperature, wind direction, precipitation, cold and warm fronts in the high and low pressure systems and the interlacing of the high and low pressure systems; First of all, it is clear that as long as it is controlled by a single air pressure system, both high pressure and low pressure are sunny, and the air pressure center is windless. Different air pressures are judged according to the isobaric gradient force and geostrophic deflection force, and the above two situations are integrated.

Geography problems are always like this, just look at your basic knowledge, and remember these keys when doing such problems: pressure gradient, geostrophic deflection force, principle of thermal expansion and contraction. Good luck in the exam!