Page 155 - SK Year 5 Science DLP
P. 155
THERMOMETER
The liquid in the thermometer will expand or contract when expose
to different surrounding temperature.
40
40
30
When the
When the 30 temperature
20 temperature increases, the
decreases, the liquid level in the
liquid level in the 20 thermometer
20 thermometer falls as rises as the liquid
the liquid contracts. expands.
20
How to use the thermometer correctly?
Let us observe how to use the thermometer with
the correct technique.
40
30
20
20
1. Place a 2. Hold the upper 3. Immerse the 4. When the liquid level
beaker filled part of the thermometer into in the thermometer
with water on thermometer the beaker. Ensure remains constant, adjust
a flat surface. upright. that the bulb of the the position of the eye
thermometer does to the meniscus of the
not touch the bottom thermometer to obtain the
surface of the temperature reading.
beaker. 147
147
6.1.2
