1. NAME : THULSIRAM A/L KUMARASWARAN CLASS : 1 RK 2 SCIENCE FORM 1SCIENCE FORM 1

2. ABSORBING AND GIVING OUT HEAT

3. The ability of an object to absorb (menyerap) and give out (bebaskan) heat depends on its surface. The surface are: - dark and dull (gelap dan pudar) - white and shiny (cerah dan berkilat) ABSORBING AND GIVING OUT HEAT

4. ABSORBING AND GIVING OUT HEATABSORBING AND GIVING OUT HEAT Depends on SURFACE (PERMUKAAN) SURFACE (PERMUKAAN) DARK and DULL (GELAP dan PUDAR) DARK and DULL (GELAP dan PUDAR) WHITE and SHINY (PUTIH dan BERKILAT) WHITE and SHINY (PUTIH dan BERKILAT) GOOD heat absorber GOOD heat radiator BAD heat reflector GOOD heat reflector BAD heat absorber BAD heat radiator is a is a

5. OBJECTS TYPES OF SURFACE EXPLANATION 1) Wall painted with white colour white surface white colour surface is a good heat reflector and can keep house in cold condition. 2) Pots and kitchen utensils painted silver colour shiny surface silver colour surface is a bad heat radiator to retain more heat. APPLICATIONS OFTHE ABSORPTION AND RADIATION OF HEAT

6. To show that dark and dull surface is a good heat radiator. EXPERIMENT: White and shiny Dark and dull 50 C

7. TYPES OF SURFACE INITIAL TEMPERATURE ( C) FINAL TEMPERATUR E ( C) Dark and Dull 50 40 White and Shiny 50 45 RESULT: