TEMPRATURE

Question 1

Main source of heat and energy

Answer 1

Sun

Question 2

What does sun do

Answer 2

Continuously radiates heat energy in all directions in the form of short waves

Question 3

The amount of solar energy received by the earth

Answer 3

Insulation

Question 4

Does the amount of solar radiation received by the earth varies

Answer 4

Yes,from place to place also with the time of the earth. Depends on the tilting of the suns rays and durations of light

Question 5

At night what happens

Answer 5

The heat absorbed by the surface of the earth is radiated out in the atmosphere in the form of long waves-terrestrial

Question 6

Conduction

Answer 6

It is the transfer of heat by contact. Lower layers of atmosphere gets heated by this process.

Question 7

Convection

Answer 7

‘Is the transfer of heat by air currents. As warm air rises, it transfers the heat from lower to higher levels

Question 8

Advection

Answer 8

is the transfer of heat through air

Question 9

Terrestial Radiation

Answer 9

is the heat emmited from the earths surface which keeps the earths atmosphere warm

Question 10

Name factors which control temprature

Answer 10

LATITUDE
ALTITUDE
DISTANCE FROM THE SEA
OCEAN CURRENTS
WINDS
CLOUD COVER

Question 11

Latitude

Answer 11

THE equator and the region near it get vertical rays as we go towards the poles there is even more slant, due to the curvature. vertical rays heat more than the slanting rays due to the concentration in an area. therefore places near the equator have high temprature. it goes on decreasing towards the poles.

Question 12

Altitude

Answer 12

close to the earths surface the layers of the air are dense and heat transfer is more.they contain lots of water vapour which absorbs the heat. as we go up the air becomes thinner and absence of water vapour is there and the dust particles permit escape of radiation back to space; therefore temprature decreases with height. Thats why hill stations are cooler than plain lands.IMPORTANT- temp. decreases at the rate of 1 degree centigrade for every 165 m increase in altitude ; this is known as ‘‘normal lapse rate’’

Question 13

Winds

Answer 13

Winds transfer heat from one region to another . warm wind increases the temprature of the area over which it blows and the cold wind decreases the temprature of the area over which it blows. example - loo a dusty wind blowing over northern india increases the temprature and aridity of the land.