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Rainfall Grade 8 Lesson
- 1. Geography Grade 8A Neemtree Primary School
- 2. Lesson :- Geography Welcometo today’s geography lesson.
- 3. Lesson :- Geography Inthe last lesson we learnt about elements of weather and climate.
- 4. Lesson :- Geography Question.1. What do we call the place where the elements of weather & climate are recorded?
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- 6. Mention the elementsof weather and climate that are recorded at the meteorological station. Answer i. Rainfall ii. Temperature iii. Humidity . iv. Air Pressure v. Sunshine vi. Cloud Cover vii. Wind Speed viii. Wind Direction
- 7. INSTRUMENT FORMEASURING RAINFALL From the diagram below ,which letter represents the instrument used for measuring rainfall? A B . . . . . C Answer = B
- 8. What is nameof this diagram used for measuring rainfall? Answer i. Rain gauge
- 9. PARTS OF THERAIN GAUGE Study the diagram and compare with the diagram on your card A B Copper Cylinder Funnel CGlass Bottle/Glass Jar Collecting Jar DOuter Casing E Measuring Cylinder
- 10. MEASURING THE AMOUNTOF RAINFALL In your own thinking ,how is rainfall measured? There are two parts you need to take care when measuring rainfall. 1. How to set up the rain gauge before rains come 2. How to record the the reading after the rains
- 11. MEASURING THE AMOUNTOF RAINFALL Setting Up a rain gauge i. Place the copper cylinder in the ground with 30cm projecting above the ground protected by the outer casing. ii. Insert the glass jar in the copper cylinder. iii. Place the funnel with the diameter of 12.7 cm into the copper cylinder ( see the diagramme from your cards).
- 12. This is howthe diagramme should be arranged. A B Copper Cylinder Funnel CGlass Bottle/Glass Jar Collecting Jar DOuter Casing E Measuring Cylinder
- 13. PRECAUTIONS WHEN SETTINGUP A RAINGAUGE. How to set up a rain gauge before rainfall is recorded i. Place rain gauge 1 meter above the ground . This helps to avoid splashes from the ground. ii. Its should be positioned away from tall buildings, trees and other high objects. These objects can either block the amount of rainfall to be recorded or the runoff water can be recorded as well. iii. Clean the rain gauge before rainfall or after along drought period. iv. Take the readings 45 minutes after rain falls.
- 14. Recording Rainfall Watchthe video clip How is rainfall recorded ? Create your first presentation
- 15. Exercise. What isthe name of the instrument used for measuring rainfall? Mention three parts of the rain gauge. How is rainfall recorded? Create your first presentation