CHAPTER 5(ENERGY AND CHEMICAL CHANGES)

SPM 2005

SPM 2006

SPM 2007

SPM 2008

ANSWER FOR OBJECTIVE QUESTIONS2005

200620072008

14

A16C13A11B

15

D17D14C12A

16

A18A15B13D

14C

Electroplating

Copper

Becomes thinner

Iron key

The iron key is coated with brown copper layer

The surface of iron key must be cleaned

Oxygen

Photosynthesis

Carbon dioxide + water Glucose + Oxygen

Chlorophyll

To absorb light

Produce oxygen for respiration

When the time increases, the volume of hydrogen gas is increases.

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