Page 161 - SK Year 5 Science DLP

LET’S TEST
LET’S TEST HEAT FLOWS
HEAT FLOWS

To describe the changes in the temperature of hot water
AIM
when it is cooled to room temperature.

APPARATUS AND Retort stand, tripod stand, wire gauze, beaker,
MATERIALS thermometer, stopwatch, and hot water.

STEPS Measure the temperature

of the hot water
1. Prepare the apparatus as shown
in the picture.
2. Pour 200 ml of hot water into the beaker.
3. Measure the temperature of the hot water
every five minutes until its temperature
becomes constant.
4. Record the observations in the table
as shown below.

Time (minutes) Temperature (°C)
0

5

5. Construct a bar chart based on the data collected.
6. Then, upload the bar chart on Google Classroom.
7. Discuss your group’s observations with other groups.

Be careful when handling the hot water.

(a) What can you observe in the trend of change in the temperature?
(b) At what minute does the temperature of the water
become constant?
(c) Describe the change in the water temperature when the hot water
cools to room temperature.

TEACHER'S
NOTE Teachers prepare the hot water.

153
153
6.1.4, 6.1.7