Geo- weather

Question 1

weather

Answer 1

day to day changes in atmosphere

Question 2

climate

Answer 2

overall pattern of weather, usually based on an average over 30 years

Question 3

weather station

Answer 3

place where the elements of weather are measure, recorded

Question 4

Stevenson screen

Answer 4

its a weather station that measures local weather conditions

Question 5

what does the Stevenson screen measure (8)

Answer 5

-rainfall
-humidity
-air pressure
-temperature
-cloud cover
-wind direction
-wind velocity
-sunshine

Question 6

characteristics of the Stevenson screen and why (7)

Answer 6

• it is a wooden box standing on 4 legs
  -double boarded roof- prevents sun heat from reaching inside
  -slatted sides- allow free entry of air and movement inside
  -1.2m above ground- not influenced by heat of surface
  -white walls reflects sun rays
• places on grass covered surface- to reduce radiation from ground
  -away from buildings and trees- so it dosent absorb heat atmosphere, and block precipitation and wind

Question 7

six’s thermometer, max-min thermometer

measures and units

Answer 7

measures- daily maximum and minimum temps
units- degrees Celsius

Question 8

maximum thermometer

Answer 8

• when temps rise, the mercury expands and pushes the index along the tube
• even if temps fall the index stays at the maximum
  -resulted are then obtained by reading the scale where the index is
• index is then down back by a magnet to measure next readings

Question 9

minimum thermometer

Answer 9

• when temps fall, alcohol contract and its meniscus pulls the index along tube
  -results are obtained by reading scale where index is

Question 10

rain gauge

measures and units

Answer 10

measures- rainfall
units- mm

Question 11

components, what does the rain gauge consist of 3

Answer 11

• cylinder in which there is collecting can containing glass or plastic jar
• it contains a funnel that fits in the top of the container
• rain falls over funnel, collected in the jar

Question 12

precautions for the rain gauge 2

Answer 12

-check everyday incase of dew accumulating, leading to false readings
-measure same time everyday and eye level

Question 13

factors of placement: rain gauge 3

Answer 13

• open space and flat surfaces to avoid runoff from obstacles entering
• 30cm above ground the funnel- avoid splashes from entering
  -sunk into ground or surrounded by bricks to avoid them being knocked over, there is stability, avoid evaporation do to sun heat