This document discusses concepts related to temperature measurements. It defines temperature as the degree of hotness of the atmosphere. It states that meteorologists measure maximum temperature at 2pm and minimum temperature just before sunrise. It defines diurnal range of temperature as the difference between maximum and minimum temperatures in a day. It provides the formula for calculating diurnal range and defines daily mean temperature as the average temperature of a day. It also discusses isotherms and the maximum-minimum thermometer used to measure temperatures.

1. WELCOME
CHAPTER 1 – SUN : THE ULTIMATE SOURCE
PRESENTED BY
SHARAN R
Emmanuel college of B.Ed. Training

2. FIND OUT THE DIFFERENCE …...

3. TEMPERATURE

4. TEMPERATURE
• Temperature is the degree of
hotness of the atmosphere.

5. MEASURES OF TEMPERATURE AT….
• Meteorologists measure weather condition at
2pm as the maximum temperature of a day.
• Minimum temperature is taken just before the
sunrise.

6. DIURNAL RANGE OF TEMPERATURE.
• The difference between the maximum and minimum
temperatures in a day is called Diurnal range of
temperature.
Diurnal range of temperature = Maximum temperature –
Minimum Temperature

7. DIURNAL RANGE OF TEMPERATURE.
Diurnal range of temperature =
Maximum temperature – Minimum
Temperature
= 33 – 28
= 5°c

8. DAILY MEAN TEMPERATURE
The average temperature of a day is called Daily mean
temperature.

9. DAILY MEAN TEMPERATURE
= 30.5 °c

10. MAXIMUM-MINIMUM THERMOMETER
The instrument which is used to calculate the maximum
and minimum temperature in a day called Maximum-
minimum thermometer

11. MAXIMUM-MINIMUM
THERMOMETER

12. ISOTHERMS
The imaginary lines connecting places having equal
atmospheric temperature reduced to mean sea level
are called Isotherms.

13. ISOTHERMS

14. ACTIVITY
Qn. Calculate the Diurnal range of temperature and
Daily mean temperature of Kochi.

15. ANSWER..
•
= 29

16. ACTIVITY
ACROSS
1. Imaginary lines that connects places having equal
atmospheric temperature called ?
2. __________ temperature is know as Daily mean
Temperature.
3. Solar energy comes to the earth surface in the form of
________
Downward
4. Degree of hotness of temperature is known as __________ .
5. Minimum temperature taken at what time ?
Qn : Complete the Puzzle.

17. ANSWER

18. QUESTIONS
1. What is meant by temperature ?
2. At what time did meteorologist measure maximum and minimum
temperature ?
3. What is Diurnal range of Temperature ?
4. Formula to calculate Diurnal range of Temperature ?
5. What is Daily mean temperature ?
6. Formula to calculate Daily mean temperature ?
7. Instrument which used to find out the maximum and minimum
temperature ?
8. What is meant by Isotherms ?

19. HOMEWORK…..
Find the today’s temperature at Trivandrum district and
Calculate the Diurnal range of temperature and Daily
mean temperature ?