weather

Question 1

6 basic elements of weather

Answer 1

temperature
pressure
wind
moisture
clouds
precipitation

Question 2

dry air composition

Answer 2

78% nitrogen
21% oxygen
1% other gases

Question 3

NATURAL AIR composition

Answer 3

dry air + condensation + water vapor

Question 4

where does weather occur in the atmosphere

Answer 4

troposphere only

Question 5

3 reasons for atmospheric circulation

Answer 5

uneven heating of the earths surface
rotating earth causes Coriolis force
tilt of the earth on its axis

Question 6

the US is positioned between which latitudes?

Answer 6

30 degrees and 60 degrees

Question 7

classification

Answer 7

review sheet

Question 8

standard temperature lapse rate

Answer 8

2 degrees C/ 1000 feet

Question 9

types of heat transfer

Answer 9

radiation
conduction
convection
advection (wind)

Question 10

transfer of heat by electromagnetic waves

Answer 10

radiation

Question 11

transfer of heat by physical contact – always travels from warm to cold

Answer 11

conduction

Question 12

transfer of heat by way of gas in a vertical movement

Answer 12

convection

Question 13

horizontal transfer of heat by wind

Answer 13

advection

Question 14

2 types of temperature inversions

Answer 14

radiation (nocturnal) – ground releasing heat

frontal – 2 air masses of different densities meet

Question 15

standard MSL pressure

Answer 15

29. 92 Hg

1013. 2 mb of hP

Question 16

all fronts are what type of pressure

Answer 16

LOW

Question 17

pressure systems

Answer 17

review notes

Question 18

how far apart are isobars

Answer 18

4mb

Question 19

what is the purpose of isobars

Answer 19

show areas of high and low pressure, wind direction and speed.

strong wind=close lines
light wind= far apart lines

Question 20

force exerted by a change in pressure per unit of horizontal distance

Answer 20

pressure gradient force

Question 21

gradient wind / wind aloft

Answer 21

above the friction level (2000 feet AGL)

Question 22

buys ballot’s law states:

Answer 22

standing with your back to the wind, low pressure will be to your left

Question 23

states of moisture

Answer 23

gas/ vapor
liquid
solid

Question 24

changes in moisture

Answer 24

evaporation
condensation
fusion/ freezing
deposition (below freezing temps)
sublimation - solid to gas
melting

Question 25

is more moisture in the air better or worse for performance?

Answer 25

WORSE – less moisture = better lift/ performance

Question 26

is more moisture in the air better or worse for performance?

Answer 26

WORSE – less moisture = better lift/ performance

Question 27

temperature of a gas is changed without the addition or deletion of heat energy

Answer 27

adiabatic process

Question 28

an altitude to which the air must be lifted for the condensed to take place. clouds will form here

Answer 28

level of condensation or lifted condensation level – temperature and dew point are the same

Question 29

CB can be embedded in what type of clouds?

Answer 29

ST

Question 30

what type of fronts have temperature inversion

Answer 30

ALL

Question 31

fronts

Answer 31

review notes