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SCIENCE FORM 1

Students Evidence

Theme : Energy

Learning Area : Heat

Learning Objective : Understand that dark and dull object absorb

heat better.

Learning Outcomes : A student should be able to :

1. State that dark and dull objects absorb heatbetter thanwhite shiny object

2. Carry out the experiment to investigate heat

absorption

Element 1 : Science Process SkillsConstruct : C1, C3, C4,C6, C7,C10 and C11Instruction : 1. Carry out activity and record observation

with result.2. Write a task report

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Activity Report Format :

1. Title : Absorption of heat

2. Aim : To investigate how different types of surface absorb

heat.

3. Hypothesis: A dark, dull surface absorbs heat better than a white,

shinysurface.

4. Variables:1) Constant :The distance from the heat source toeachsurface

2) Manipulated : Type of surface

3) Responding : Temperature of the air in each can

5. Apparatus/Material: Two beverage can, black rough paper,

bunsen burner,thermometer and cork.

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6. Procedure :

1. One of the beverage can is covered with blackrough paper and the other one with white

glossy paper .

2. The apparatus are set up as shown in the

diagram.

3. The readings of both thermometers are recorded in two

minutes interval for 10 minutes.

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Procedure:

Bunsen

burner

Dark and dullsurface

White and shinysurface

Thermometer

cork

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Observation and result :

Time

(minute)

0 2 4 6 8 10

Temperature

(C)

26 29 33 37 41 45

Dark surface

Time(minute)

0 2 4 6 8 10

Temperature

(C)

26 27 29 31 33 35

White surface

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8. Discussion And analysis:

i) Why must the flasks be placed equally far from the

candleflame?

To allow both flasks to receive the same amount of heat .

ii) Which surface absorbs heat better?

Dark and dull surface absorb heat better than white surface.

iii) Which colour of dress will make you feel hotter, blackorwhite? Explainyour answer.

Black colour of dress will make me feel hotter becauseit absorbs heat better than white dress.

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iv) Based on your experiment. Explain how to dry up fishes in a short

duration oftime.

Fishes could be dried up in a short duration of time

on a darkand dull tray as dark and dull tray is a good

absorber of heat.

v) State the increase temperature of flask A and B after 10 minutes.The increases of temperature of flask A is 19 C and can B is 9 C.

vi) Which can shows a greater increase in temperature?

Dark and dull can

vii) Based on the observation, what can you say about the changesin temperature with time? Explain your answer.The longer the time of heating, the higher the temperaturebecause the can absorbs heat.

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9.Conclusion :

Dark and dull surface is a good absorber ofheat.

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NO CONTENT YES

1 Title /

2 Aim /

3 Hypothesis /

4 Variable /

5 Apparatus/Material /

6 Procedure /

7. Observation andresult

/

8. Discussion andanalysis

/

9. Conclusion /

Activity Report Checklist :