Ocean Navigation - Meteorology (Atmosphere)

Question 1

What’s is the composition of the earth’s atmosphere?

Answer 1

Nitrogen - 78.09%
Oxygen - 20.95%
Argon - 0.93%
Carbon Dioxide - 0.03%

Question 2

What happens to air pressure and air density as altitude increases?

Answer 2

Both air pressure and air density decrease

Question 3

What is average air pressure at sea level?

Answer 3

Around 1000mb

Question 4

What is Conduction?

Answer 4

Heat transfers between objects by direct contact

Question 5

What is Convection?

Answer 5

Heat transfers within a fluid

Question 6

What is Radiation?

Answer 6

Heat transfers through electromagnetic waves

Question 7

What is Dew Point?

Answer 7

The temperature at which a particular sample of air becomes saturated

Question 8

What is Specific heat?

Answer 8

Amount of heat required to change temperature

Question 9

What is Latent heat?

Answer 9

Amount of heat required to change state

Question 10

Describe the Tropopause

Answer 10

Upper boundary to Troposphere, varies in altitude from 8km at the poles to 18km at the equator, temperature increases above this level (Invesrsion)

Question 11

What is Advection?

Answer 11

Air moving horizontally carries energy from area to area

Question 12

What is evaporation?

Answer 12

Water changing state to water vapour, latent heat is absorbed

Question 13

What is condensation?

Answer 13

Water vapour changing state to Water, latent heat is released

Question 14

Because of Diurnal variation, when is temperature minimum and maximum?

Answer 14

Minimum at dawn, maximum during the afternoon

Question 15

What is Absolute Humidity?

Answer 15

Weight of water vapour present in the atmosphere

Question 16

What is Relative Humidity?

Answer 16

The amount of water vapour present in air expressed as a percentage of the amount needed for saturation at the same temperature