there are actually four and they are frontal wedging, mountain lifting, convergence, and lifting by heat.
1) Weather and precipitations 2) Altitude 3) Air Temperature
Sometimes oil spills can cause pollution.
pressure space and weight
The gas was Hydrogen.
For flinging boulders high into the air and into walls or buildings to destroy them. It was also launched on infantry sometimes. The idea seems simple, but the mechanisms that make the machine work are very complex. People have had a hard time making Lego models of them!
Orographic lifting
Heat can cause air to rise :)
The 4 lifting mechanisms that make air rise are orographic lifting (when air is forced upward by a mountain or slope), frontal lifting (when warmer, less dense air is forced over cooler, denser air), convergence lifting (when air flows together and is forced to rise) and convectional lifting (when air is heated and rises due to its reduced density).
Orthographic Lifting- air is forced to rise over a mountainous area Frontal wedging- warmer, less dense air is forced over cooler, denser air Convergence- a pile-up of horizontal air flow results in upward movement
Three lifting mechanisms for air are thermal lifting, dynamic lifting, and convergence lifting. Thermal lifting occurs when air near the ground is heated and rises. Dynamic lifting occurs when air is forced upward due to the movement of weather systems. Convergence lifting occurs when air flows together at the surface and is forced to rise.
Heating of the air by the Earth's surface, leading to a decrease in density and causing it to rise. Convergence of air masses where air is forced to rise to fill the resulting low-pressure area. Orographic lifting, when air is forced upward as it encounters a barrier like a mountain range.
The three airstream mechanisms are egressive (air moves outwards), ingressive (air moves inwards), and pulmonic (airflow generated by the lungs). These mechanisms are used to produce sounds in human speech and in various musical instruments.
An increase in temperature would cause air pressure to rise. As air warms, its molecules gain more kinetic energy and spread further apart, leading to an increase in pressure. Cold air entering a region or moisture entering the air would not directly cause air pressure to rise.
Air pressure begins to rise in a situation where there is a change in the temperature, especially when there is cold air hitting the ground. The rise in air pressure produces winds and different types of weather.
Differing air temperature causing cold air to sink, and warm air to rise is the main cause of air movement.
When you increase air pressure the mercury in a barometer will rise. Conversely when air pressure decreases the mercury in a barometer will drop.
Differences in air pressure cause air to flow from areas of high pressure to low pressure. In a chimney, the warm air from the fire creates a lower pressure inside the chimney relative to the outside, causing the smoke to rise up and out of the chimney.