Question 1
- What is a line of longitude?
- What is the local time at Alexandria 300E if the local time at Malindi is 12noon?
Answer
- - A longitude is an imaginary line which is drawn on a map joining the North and the South Pole
-
Time and longitude: calculation:
(i) Longitude difference:
(400 - 300) = 100
(ii) Time difference:
But 10 = 4 min
Hence; 100 × 4 min=40minutes
Alexandria is west of Malindi; therefore it is behind in time by 40 minutes.
(iii) Thus the local time at Alexandria will be:
(12.00-40 minutes) = 11:20 am.
Question 2
- Describe how humidity is measured
- Give two factors that influence relative humidity.
Answer
-
- Set up the wet bulb and dry the bulb thermometers (hygrometer).
- After 24 hrs read and record the temperature of the wet bulb thermometer
- Also; read and record the temperature of the dry bulb thermometer.
- Get the difference in temperature readings of the wet and dry bulb thermometers
-
- Distance from large water bodies
- Temperature
Question 3
- Give three reasons why geographers study the plate tectonics theory
- Name two types of tectonic plate boundaries
Answer
-
- To understand the origin of continents
- To understand the formation of physical features
- To understand the significance associated with the movements of plates
-
- Extension /Tensional/constructive boundaries
- Compressional/destructive boundaries
Question 4
The table below shows temperature readings at a weather stations for one week.
Calculate:
-
(i) The diurnal range of temperature for Thursday.
(ii) The mean temperature for Monday. -
(i) Apart from water vapour, name two other substances that are suspended in the atmosphere
(ii) Give two factors that are considered when classifying clouds
(iii) Name two types of clouds that give rise to rainfall in the tropical regions.
Answer
-
(i)
(max - 260 C - min.160c) =100c
(ii) 280c + 180c=460c
460c/2=230c -
(i) - Gases such as – carbon dioxide and oxygen.
- Air(wind)
(ii) - The latitude
- Appearance
(iii) - Cumulus
- Nimbus
Question 5
Name two conditions that lead to deposition of silt at the mouth of a river.
Answer
- Overloading
- Loss of velocity
- Loss of velocity