01. The Atmosphere Flashcards
The Atmosphere
The composition of the atmosphere gases is what proportion;
- Nitrogen
- Oxygen
- Other
- 78%
- 21%
- 1%
2
Which 3 gases play the most significant part on the worlds weather
- CARBON DIOXIDE
- OZONE
- WATER VAPOUR
3
The Atmosphere
Water vapour makes up at most on average how much % of the atmosphere
4%
3
The Atmosphere
Most water vapour in the atmopshere is found at what level altitudes
LOW ALTITUDES
3
The Atmosphere
Water vaopour is found mostly at low altitudes and in what temperatures
HIGH AIR TEMPERATURE
(The Tropics)
Most of the water vaoupr in the amtosphere is found at low altitudes and in areas of higher air temperature, the tropics
3
The Atmosphere
The Suns energy radition waves are SHORT or LONG wave
SHORT WAVE
3
The Atmosphere
The Earths main source of heat comes from where
THE EARTHS SURFACE
The sun heats the surface, which then radiates heat back into the atmopshere
3
The Atmosphere
Heat emitted back into the atmosphere from the surface is SHORT or LONG wave radiation
LONG WAVE
3
The Atmosphere
Long Wave radiation emitting back from the surface of the Earth into the atmosphere is absorbed by what 2 gases causing the greenhouse effect
- CARBON DIOXIDE
- WATER VAPOUR
3
The Atmosphere
Ozone is made from what gas and how many atoms
- OXYGEN
- 3 ATOMS
3
The Atmosphere
Ozone is concentrated at what layer of the atmosphere
STRATOSPHERE
3
The Atmosphere
Between what altitude in the stratsophere is the ozone present
1. In feet
2. In KM
- 50,000 to 100,000 ft
- 15 to 30 km
The Atmosphere
What radiation does Ozone absorb from the Sun
UV RADIATION
3
The Atmosphere
As a result of the Ozone absorbing UV radiation from the Sun, what does this cause in the upper atmosphere
RISE IN TEMPERATURE
3
The Atmosphere
The maximum heating of the upper atmosphere as a result of Ozone absorbing UV radiation and subsequently causing the upper atmosphere to heat us is at what altitude
1. in feet
2. in KM
- 160,000 ft
- 50 km
3
The Atmosphere
What is the general gas law equation
PRESSURE x VOLUME = R x TEMPERATURE
becomes..
DENSITY ∝ PRESSURE / TEMPERATURE
Where R = gas constant
- Density is defined as the mass of a unit volume of gas.
- Density is inversely proportional to volume
- If VOLUME goes up, DENSITY goes down an visa versa
- Therefore, VOLUME can be replaced with DENSITY
example.. - Density = pressure / temperature ⋉ 6 / 2 = 3
- If pressure goes up, density goes up; 8 / 2 = 4
- Similarly, if pressure goes down, density goes down; 4 / 2 = 2
- Inversely, if temperature goes up, density goes down; 6 / 2 = 3 or 6 / 3 = 2 or 6 / 4 = 1.5
3
The Atmosphere
At a constant temperature, density is DIRECTLY or INVERSELY proportional to pressure
DIRECTLY
Pressure ⇧ then Density ⇧
4
The Atmosphere
At a constant pressure, density is DIRECTLY or INVERSLEY proportional to temperature
INVERSLEY
Temperature ⇧ then Density ⇩
5
The Atmopshere
What is the definition of pressure
FORCE PER UNIT AREA
6
The Atmopshere
Pressure is measured in milibar which is equivilant to Hectopascals (hPa). North America uses inches of mercury (in Hg). Using a mercury barometer, the standard atmsophere measures around 30 in Hg, or exactly 29.92. The standard atmsophere equivilant of hPa is 1013.
Therefore, if the pressure given is 1013 milibars, what is the hPa and in Hg equivilant
1013 mB = 1013 hPa = 29.92 in Hg
6
The Atmopshere
Pressure is measured by what instrument
BAROMETER
6
The Atmopshere
“uses a closed evacuated capsule that expans and contracts under changing pressure”
This is a definition of what sort of barometer
ANEROID BAROMETER
7
The Atmopshere
What flight intrument in the aircraft cockpit uses an aneroid barometer
ALTIMETER
7
The Atmopshere
“An aneroid barometer that records changing pressure in a graphical form giving a representation of pressure over time”
This is a definition of what sort of equipment
BAROGRAPH
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The Atmopshere
Equal lines of pressure joined up are known as what
ISOBARS
7
The Atmopshere
Isobars on a surface weather chart will give an overview of pressure distribution but also gives an estimation of what other weather factor
WIND DIRECTION AND SPEED
at any given point on the chart
7
The Atmopshere
“The kinetic energy, or energy of motion, of the gases that make up the air”
This is a definition of a measurement of what
TEMPERATURE
8
The Atmopshere
As gas molecules move more quickly, air temperature will INCREASE or DECREASE
INCREASE
8
The Atmopshere
What is the equipment used for measuring temperature
THERMOMETER
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The Atmopshere
4 examples of other factors of weather that temperature influences;
- The rate of ____
- ____ ____ , measure of water vapour per parcel of air
- Wind ____ and ____
- ____ patterns and types
- EVAPORATION
- RELATIVE HUMIDITY
- Wind SPEED and DIRECTION
- PRECIPITION patterns and types
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The Atmopshere
If you are given 0°C what are the equivilant temperatures in the Kelvin and Fahrenheit scales
Kelvin (K) = Celsius (°C) = Fahrenheit (°F)
-273 K = 0°C = 32°F
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The Atmopshere
What is the equation to determine Fahrenheit (°F) from a given°C
°F = ( °C x 1.8 ) + 32
°F = ( °C x 1.8 ) + 32
°F = ( 10°C x 1.8 ) + 32
°F = 18 + 32
°F = 50
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