Answer:
There are two reasons: at higher altitudes, there is less air pushing down from above, and gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more, and air density decreases
Answer:
Warm fronts normally involve the centers of low pressure, and hence the barometric pressure will start falling. This allows the weather forecasters to detect that a warm front is approaching. The pressure starts stabilizing before rising again
Air is a protective cushion
The air in our atmosphere acts as insulation, keeping the Earth from getting too cold or too hot. Ozone, another type of gas in the air, also protects us from too much sunlight. Air in the atmosphere can also protect us from meteoroids
The direction of wind flow around an atmospheric high-pressure area and a low-pressure area, as seen from above, depends on the hemisphere. High-pressure systems rotate clockwise in the northern Hemisphere; low-pressure systems rotate clockwise in the southern hemisphere
Explanation:
Fast growing cities rarely had sewage systems which increased disease. Also many factories let out pollutants in the air. They also had few safety regulations and employed children, usually orphans, leading to many accidental deaths due to machinery and fire.
Answer:
The population density of the city is 20,000 persons per square mile
Explanation:
Population density is defined as the total population living in a region divided by the total area of the region
Here
Population = 100000
Area of the city = 5 square mile
Density = 
people per square mile
The population density of the city is 20,000 persons per square mile
