PHYS203 NJIT-Questions 2025/2026 with 100%
Correct Solutions
The atmosphere is thin compared
to the radius of the earth
Nitrogen and oxygen make up
99% of dry air
Other atmospheric gases absorb heat and
block harmful radiation from the sun
The proportion of oxygen in the atmosphere is closely tied to the evolution of the
earths biosphere
Atmospheric gases are measured as high as
500 km
internationally accepted earth-space boundary is at
100km
Motion of air in thermosphere is related to the transfer of
thermal energy
The atmosphere can be divide into
four layers
lowermost layer shows decreasing in temperature with increasing altitude
, troposhere
The troposphere is heated by the earth and contains
most of the weather systems
this layer is the 2nd layer and is charaterized by increasing temperature with altitude
stratosphere
the stratosphere contains the ozone which absorbs
ultraviolet radiation
3rd layer is characterized by decreasing temperature with altitude
mesosphere
mesosphere decrease is because of decreased density of air and
less absorption of radiation
outer most layer, is characterized by increasing temperature with altitude
Thermosphere
The thermosphere blocks
cosmic rays
density of air decreases with
altitude
Pressure which is the weight of the overhead air per unit area
Correct Solutions
The atmosphere is thin compared
to the radius of the earth
Nitrogen and oxygen make up
99% of dry air
Other atmospheric gases absorb heat and
block harmful radiation from the sun
The proportion of oxygen in the atmosphere is closely tied to the evolution of the
earths biosphere
Atmospheric gases are measured as high as
500 km
internationally accepted earth-space boundary is at
100km
Motion of air in thermosphere is related to the transfer of
thermal energy
The atmosphere can be divide into
four layers
lowermost layer shows decreasing in temperature with increasing altitude
, troposhere
The troposphere is heated by the earth and contains
most of the weather systems
this layer is the 2nd layer and is charaterized by increasing temperature with altitude
stratosphere
the stratosphere contains the ozone which absorbs
ultraviolet radiation
3rd layer is characterized by decreasing temperature with altitude
mesosphere
mesosphere decrease is because of decreased density of air and
less absorption of radiation
outer most layer, is characterized by increasing temperature with altitude
Thermosphere
The thermosphere blocks
cosmic rays
density of air decreases with
altitude
Pressure which is the weight of the overhead air per unit area
