Weather Details

Question 1

Constituents of weather/climate

Answer 1

-Rainfall
-Temperature
-Wind direction
-Wind strength
-Air pressure
-Sunshine
-Humidity
-Cloud cover

Question 2

Ideal conditions/characteristics for a Stevenson Screen

Answer 2

-Sited away from artificial sources of heat
-Screen door faces away from sunlight(so direct sunlight does not affect readings)
-Have security measure or protection(to prevent damage by people or animals)
-Sited on grass or bare earth(other surfaces may absorb the Sun’s heat and re-radiate it upwards, affecting temperature readings)
-Sited on level ground
-Sited in an open area, away from trees/buildings(so air can circulate freely/screen is not under shade)
-Has a roof(to prevent rain or direct heat from affecting the instruments)
-Has a hinged door for access

Question 3

How a rain gauge works

Answer 3

-Precipitation falls inside metal cylinder
-Precipitation goes through a metal funnel into a collecting bottle
-Contents are transferred into a standard measuring cylinder and measured at regular intervals

Question 4

How a wind vane works

Answer 4

-Wind moves arrows
-Arrow points towards the direction that the wind is coming from

Question 5

How a cup anemometer works

Answer 5

-Wind forces cups to rotate(cups are connected to a meter)
-Meter converts rotations into wind speed

Question 6

How sunshine recorders work

Answer 6

-Sun’s rays pass through a glass sphere
-They burn a piece of a heat-sensitive black card(the card has hours and minutes of the day on it)
-As the sun appears to move around, it burns a line
-Line indicates when and for how long there was sunshine