02. Lesson Temperature and humidity

a) At ground level.

b) At approximately 10 metres above ground level.

c) At approximately 4 feet above ground level.

d) At approximately 4 metres above ground level.

a) Incoming solar radiation is reflected back to space and outgoing terrestrial radiation is reflected back to earth.

b) Incoming solar radiation is re-radiated back to space and atmospheric heating by convection will stop at the level of the cloud layer.

c) The cloud stops the sun rays getting through to the earth and also reduces outgoing conduction.

d) Incoming solar radiation is reflected back to space and outgoing terrestrial radiation is re-radiated from the cloud layer back to the surface.

a) Tephigram.

b) Aircraft reports.

c) Temperature probes.

d) Radio sonde.

a) Greater over sea than overland.

b) Less over desert areas than over temperate grassland.

c) Reduced anywhere by the presence of cloud.

d) Increased anywhere as wind speed increases.

a) Warmer in winter over land, colder in summer over sea.

b) Colder in winter over land, warmer in winter over sea.

c) Cold in winter over land and sea.

d) Warmer in summer over land and sea.

a) Condensation in which latent heat is released.

b) Evaporation in which latent heat is released.

c) Condensation in which latent heat is absorbed.

d) Evaporation in which latent heat is absorbed.

a) Conditionally saturated.

b) Partially saturated.

c) Saturated.

d) Dry.

a) Heat is absorbed during the process of condensation.

b) Heat is released during the process of condensation.

c) Heat is absorbed by the thermometer during the process of evaporation.

d) Heat is released from the thermometer during the process of
evaporation.

a) Air temperature over wet bulb temperature * 100.

b) Air temperature over dew point temperature * 100.

c) The actual amount of water vapour in a sample of air over the maximum amount of water vapour that the sample can contain *100.

d) The maximum amount of water vapour that a sample of air can contain over the actual amount of water vapour the sample does contain * 100.

a) The number of water droplets in a given quantity of air.

b) The amount of water vapour that a quantity of air holds.

c) The maximum amount of water vapour that a given quantity of air can hold.

d) The maximum number of water droplets that a given quantity of air can hold.

a) condensation causes a release of latent heat.

b) evaporation causes cooling.

c) latent heat is absorbed by the bulb thermometer.

d) of condensation on the muslin wick of the bulb.

a) Is measured using a hydrometer.

b) Is the minimum temperature to which a thermometer bulb can be cooled by the evaporation of water.

c) Measures the dew point of air.

d) Is the minimum temperature reached by the surface of the earth as
measured by a thermometer placed 1,2 metres above the ground.

a) If the air temperature falls then the absolute humidity must increase.

b) The absolute humidity is the mass of water vapour contained in unit volume of air.

c) The diurnal variation of dewpoint temperature is greatest when skies are clear at night.

d) The dewpoint temperature is the temperature indicated by the wet bulb thermometer.

a) Lesser released

b) greater absorbed

c) greater released

d) lesser absorbed

a) Latent heat is absorbed.

b) Specific heat is released.

c) Latent heat is released.

d) Specific heat is absorbed.

a) Increase during the day and decrease at night.

b) Stay reasonably constant throughout the 24 hours.

c) Reduce during the day and increase at night.

d) Only change with a change of airmass.

a) Fall, rise rise.

b) Rise, rise, fall.

c) Fall, rise, remain the same.

d) Fall, fall, remain the same.

a) Insolation.

b) Condensation.

c) Evaporation.

d) Sublimation.

a) Hydrometer.

b) Hygrometer.

c) Wet bulb thermometer.

d) Hygroscope.

a) Evaporation in which latent heat is absorbed.

b) Evaporation in which latent heat is released.

c) Condensation in which latent heat is absorbed.

d) Condensation in which latent heat is released.