The document provides guidance for measuring body temperature using a thermometer, detailing its historical development and safety measures when using mercury thermometers. It outlines group activities involving temperature measurement and comparisons, along with questions to assess understanding of temperature concepts, such as boiling and freezing points. Additionally, it emphasizes the importance of choosing the correct estimates for various temperatures in everyday scenarios.

2. Mother wants to find out if her
son has a fever. What is the
best thing mother can use to
find the body temperature of
her sick son?

3. Reading and Measuring
Temperature Using
Thermometer (Alcohol
and/or Digital) in Degree
Celsuis

4. What is a temperature?
 is the hotness or coldness of an
object. It can be expressed in
“Degree Celsius”.

5. What is the device used to
measure temperature?

6.  Thermometer

7. The thermometer was developed over time. The idea
of measuring temperature stated in AD 170 by a Greek
scientist and physician Galen. In 1953, renowned scientist
Galileo Galilei developed the thermoscope. This device can
show the difference in temperature but it cannot tell
exactly the difference. It is a thermometer without scale.
Several decades later, Italian inventor Santorio
Santorio placed a scale in Galileo’s invention and it was
used to take human temperature. From then on, the
device was further developed to become more accurate and
user-friendly.
Source: www.livescience.com

8. Present a model of an improvised
thermometer. It has a movable red
ribbon which resembles the mercury in
an actual thermometer.

9. Safety Measures in Handling Thermometer Using Mercury
1. The thermometer should be washed before and after use.
2. Shake the thermometer a few times to bring the level of
mercury down.
3. Do not hold the thermometer by its bulb.
4. Keep the mercury level along your line of sight and then take
the reading.
5. Handle the thermometer with care. Avoid hitting it against
some hand object, it may break.
6. Do not place the thermometer in a hot flame or in the hot sun.

10. Group Activity
Group 1 – Measure and read your body temperature
by putting the digital thermometer under your armpits.
Record and compare the results with the other
classmates.
Group 2 – Read and record each thermometer reading.
Group 3 – Look at the picture and write if it is HOT or
COLD.

11. Processing the Activities
•Ask: How did you find the activity?
•How were you able to read and
measure the temperature?

12. What is the temperature for each?
Boiling point of water - __________
Freezing point of water - _________
Normal body temperature- _________

13. Circle what you think is the
temperature of the following:
1.Hot water a. -10◦C b. 30◦C c. 70◦C
2.A person with fever a. 30◦C b. 35◦C c. 40◦C
3.Ice cold tea a. 10◦C b. 20◦C c. 40◦C
4.Bread in oven a. 50◦C b. 150◦C c. 290◦C
5.Ice candy a. 100◦C b. 35◦C c. 0◦C

14. Summarizing the Lesson
• What is a temperature?
• How can we measure temperature?
• What are the parts of a thermometer?
• What is the metric unit for measuring temperature?

15. Assessment:
Find the temperature of the following.
1.Choose the correct estimate of the
temperature of each.
• a.Hot coffee 30◦C 85◦C
• b.Strawberry shake 5◦C 50◦C
• c.Distilled water 20◦C 75◦C
• d.High fever 40◦C -15◦C
• e.Air conditioned room 10◦C 90◦C