Answer:
The type of front depends on both the direction in which the air mass is moving and the characteristics of the air mass. There are four types of fronts that will be described below: cold front, warm front, stationary front, and occluded front.
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Answer:
P waves are compressional which means they move through a solid or liquid by pushing or pulling similar to the way the sound travels through air, the particles of the material a P wave pushes through moves in the direction of the P waves energy, this is called the direction of wave propagation
<span>Scientists have been doing several experimentation
and discovery of the changes of the ice on the pole. Recent evidence from polar
ice core analysis shows that, until now, carbon dioxide levels have never
exceeded 300 ppm in the last several hundred thousand years.</span>