The intensity of radiation reaching the upper surface of the atmosphere is taken as

Momentary state of the atmospheric environment at a certain location is called

The value of solar constant is

Maximum intensity is received on a plane normal (perpendicular) to the direction of radiation

23.5°N is called as

At aphelion the solar distance is

On 21 March and 23 September day and night of equal length which is called as

The temperature of the air is measured in ,

the cosine law, which states that the intensity on a tilted surface equals the normal intensity times

The ratio of the actual amount of moisture present, to the amount of moisture the air could hold at the given temperature, is

At perihelion the solar distance is

On 21 June areas along latitude 23.5°N. are normal to the sun's rays,

The sun’s radiations are minimum

Two factors to determine climate are

As elevation increases, temperature

An imaginary line that is parallel to the equator

How is precipitation measured

Humidity is usually measured with the

The variation between a high air temperature and a low temperature that occurs during the same day

Select 2 Elements of climates

Precipitation is the collective term used only for rain, and not for snow, hail, dew and frost

Sky conditions are usually described in terms of presence or absence of

The amount of moisture actually present in unit mass or unit volume of air, is

Realtive humidity expressed as a

Wind velocity is measured by a

The spectrum of short infra-red radiation extends

How many cardinal, semi-cardinal and tertiary compass points respectively

The spectrum of solar radiation of visible light is

The earth moves around the sun in a slightly spherical orbit.