WEATHER - KCSE GEOGRAPHY NOTES, AUDIOVISUALS, Q & A, OTHER RESOURCES

• CONTENT
• NOTES
• AUDIOVISUALS
• Q & A

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Specific Objectives

By the end of the topic, the learner should he able to:

1. define the term weather
2. state the elements of weather
3. explain the conditions necessary for siting a weather station
4. use instruments to measure elements of weather
5. analyse and interpret data on weather conditions
6. describe the structure and composition of the atmosphere
7. explain factors influencing weather
8. carry out field study on a weather station.

CONTENTS

1. Definition of the term weather
2. Elements of weather
3. Factors for siting a weather station
4. Instruments for measuring elements of weather
5. Recording and calculating weather conditions
6. Structure and composition of the atmosphere
7. Weather forecasting
8. Factors influencing weather
9. Field-work
   1. A study on a weather station

​Daily atmospheric conditions of a place at a particular time.

​Elements of Weather

1. Temperature
2. Humidity precipitation
3. Precipitation
4. Atmospheric pressure
5. Wind
6. Sunshine
7. Cloud cover

KCSE Past Papers

• KCSE 2007 
• KCSE 2008 
• KCSE 2009 
• KCSE 2010 
• KCSE 2011 
• KCSE 2012 
• KCSE 2013 
• KCSE 2014 
• KCSE 2015 
• KCSE 2016 
• KCSE 2017 

Physics Notes

KCSE PHYSICS NOTES, AUDIOVISUALS AND MORE

Computer Studies Notes

kcse Computer Studies Notes

​A Weather Station

A place where observation, measuring and recording of weather elements is done
Factors to Be Taken Into Account When Sitting a Weather Station

• An open place where there is little obstruction of weather elements.
• Accessible place so that recording can be done easily.
• A fairly level or gently sloping ground (5◦) so that it’s easy to position weather instruments.
• The place should provide a wide view of the surrounding landscape and the sky.
• The site should be free from flooding.
• The place should have security.

Instruments for Measuring Elements of Weather

1. Thermometer-temperature
2. Hygrometer-humidity
3. Rain gauge-rainfall
4. Barometer-air pressure
5. Sunshine recorder-sunshine duration and intensity
6. Wind vane –wind direction
7. Anemometer-wind speed
8. Evaporimeter-rate and amount of evaporation.

FIGURE 1: THE STEVENSON SCREEN

A white wooden box mounted on 4 legs used to house thermometers and hygrometers.
The instruments which are found in it are:

1. Maximum thermometer
2. minimum thermometer
3. Six’s thermometer
4. hygrometer-wet bulb and dry bulb thermometer

​Importance of the Stevenson Screen

1. Provide shade conditions for accurate temperature recording.
2. Ensure safety of thermometers because they are delicate.

Qualifications Which Make Stevenson Screen Suitable For Its Work

1. Painted white for little absorption of solar heat energy.
2. Made of wood which is a bad conductor of heat.
3. Well ventilated to allow easier flow of air inside it.
4. Raised to prevent contact with terrestrial radiation.
5. Has double roof which acts as an insulator to prevent direct heating from the sun.

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Weather Question

1. Define the term “weather”
2. Write down seven elements of weather.   
3. Describe how the following weather instrument work.
   1. An anemometer
   2. Maximum thermometer
4. Using a well labelled diagram describe how the relative humidity is measured.
5. Give the seven factors that influence the temperature of a place.
6. Briefly describe the following type of fog.
   1. radiation fog
   2. Steam fog
   3. Hill fog
   4. Frontal fog
7. Name three effects of rotation of the earth
8. Apart from water vapour name two other substances that are suspended in the  atmosphere
9. Give two factors considered when classifying clouds
10. Name two types of clouds that give rise to rainfall in the tropical regions
11. Suppose you visited a weather station  for field study on weather. 
    1. Give three methods you would use to collect the data
    2. Name four ways you would prepare for the study
12. Identify two instruments of measuring weather kept in the Stevenson screen
13. State conditions necessary in siting a weather station
14. Give  reasons why stevenson`s screen is
    1. Painted white
    2. Has louvers
15. Name liquids found in six`s thermometer
16. Define wind
17. Draw a well labeled diagram of a sea breeze
18. Name two ways of identifying clouds
19. Give two examples of low clouds
20. Name two components of the atmosphere
21. Name layers of the atmosphere
22. Which layer of the atmosphere is ozone layer
23. Give three characteristics of the lower layer of the atmosphere
24. Define the following terms
    1. Zero- lapse rate
    2. Negative lapse rate
    3. Positive lapse rate
    4. Which layers of the atmosphere  experience positive lapse rate
25. The table below shows the temperature and rainfall readings for station in one  week. Use it to answer questions which follows
    1. Calculate the range of temperature for the week
    2. Calculate the total mean weekly temperature
    3. Calculate the total rainfall for the week
    4. Why is weather forecasting important
    5. Name four factors which influence  temperature of a place

TOPIC 3 - WEATHER.pdf
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TOPIC 1 - INTRODUCTION TO GEOGRAPHY.pdf
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TOPIC 2 - EARTH AND THE SOLAR SYSTEM.pdf
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