SECTION C

NO. 10 DESIGN EXPERIMENT

Q: No 10 spm 2008 Study the following statement. Electrical conductivity (RV) of metals and non- metals (MV)are different

HYPOTHESISMetal can conduct electricity //MV RV Metals will light up the bulbMV RVAIMTo study the .RV of MV

VARIABLESManipulated : ............. ( different)(ii) Responding : ( result exp)(iii) Constant : (same)APPARATUS(App for MV) (App for RV ) (App for CV ) Copper rod, glass rodBulbDry cell, wires

PROCEDURE

1. Connect the battery to bulb with wire2. Complete the circuit by connecting a copper rod (MV)3. Observe the condition of bulb (RV)4. Repeat the experiment using glass rod (MV)

TABULATION DATA

Type of rod(MV)Condition of bulb(RV)Copper rod

Glass rod

SECTION CNO: 12b atau 13bMENGKONSEPSIPENYELESAIAN MASALAHMEMBUAT KEPUTUSAN

MENGKONSEPSI 12b spm 2007Q: 12 b SPM 2007

2 CHARATERISTICS (2 marks)C1 : Can be remouldedC2 : Low melting pointANOTHER EXAMPLE(1 mark)Perspex / Nylon

2 NON-EXAMPLES(2 marks)BakeliteMelamine CONCEPT(1 mark)Q is C1+C2THERMOPLASTIC is the plastic that can be remoulded (C1) and low melting point (C2)

PENYELESAIAN MASALAH 11b spm 2008

PROBLEM (1 mark)Dengue fever in a residental areaCLARIFICATION (1 mark)Dengue is spread by Aedes4 METHODS( 4 mark )Kill the mosquitoes by fogging / insecticidesPut abateClear stagnant water/clogged drainEducate the public

A students uniform was dirtied by grease while cleaning a machine in a workshop. Using a scientific principle, explain how he could remove the grease from his uniform. (SPM 2003)

STEPSANSWERIdentifying problemTo remove grease from the uniform / cloth ii. Method ( Chemical / Process / Equipment / Principal used )Using detergent / soap

iii. Explanation( how Chemical / process / Equipment / Principal react ) DIAGRAM1. Soap dissolves in water 2. The head of soap / ionic part dissolves in water and the tail of soap / hydrocarbon part dissolves in grease 3. Soap molecules surround the grease surface 4. Brushing / rinsing will remove the grease from the uniform 5. Grease particles disperse in water ( any three )

MEMBUAT KEPUTUSAN- 12b spm2008

AIM OF CHOICE( 1 mark )To choose the most suitable vehicle which has safety featuresCOMPARISON( 3 marks )

12.112.2Has air bagNo air bagHas seat beltHas seat beltHas front and rear crumple zoneNo front and rear crumple zone

THANK YOU and GOOD LUCK

CHOOSE THE BEST( 1 mark )CarEXPLAIN THE USES OF SAFETY FEATURE(1 mark )Has air bag to protect the driver during accident