Created by Katete Isaac.Digital Ambassador Zambia,British Council Connecting Classrooms

1. Geography Grade 8 A
Neemtree Primary School

2. Lesson :- Geography
Welcome to today’s geography
lesson.


3. Lesson :- Geography
In the 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?

5. Answer:
Weather or Meteorological station

6. Mention the elements of 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 FOR MEASURING RAINFALL
 From the diagram below ,which letter represents the
instrument used for measuring rainfall?
A B
.
.
.
.
.
C
Answer = B

8. What is name of this diagram used for
measuring rainfall?
Answer
i. Rain gauge

9. PARTS OF THE RAIN 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 AMOUNT OF 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 AMOUNT OF 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 how the diagramme should be arranged.
A
B
Copper Cylinder
Funnel
CGlass Bottle/Glass Jar
Collecting Jar
DOuter Casing
E
Measuring Cylinder

13. PRECAUTIONS WHEN SETTING UP 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
 Watch the video clip
 How is rainfall recorded ?
Create your first presentation

15. Exercise.
 What is the name of the instrument used for
measuring rainfall?
 Mention three parts of the rain gauge.
 How is rainfall recorded?
Create your first presentation