1. Lecturer:
Group members:
ABDUL RAHMAN BIN YUSUF UK26406
ZAIIMAH BINTI ROZMAN UK25649
SITI SOLEHA BINTI MUSTAFFA UK24901
WAN AZWIRA BINTI AB GHANI @ WAN AHMAD UK26257
NURUL SYAZDIANA BINTI MOHD ZUKI UK26258

2. Elements Approximate % by weight
O x y g e n (O ) 46.6
S i l i c o n (S i ) 27.7
A l u m i n u m (A l ) 8.1
I r o n (F e ) 5.0
C a l c i u m (C a ) 3.6
S o d i u m (N a ) 2.8
P o t a s s i u m (K ) 2.6
M a g n e s i u m (M g ) 2.1

5. 

17.  http://education.jlab.org/glossary/abun
d_ele.html
 http://www.windows2universe.org/earth/
geology/crust_elements.html
 http://chemistry.about.com/od/element
facts/a/silicon.htm
 http://www.webelements.com/potassiu
m/chemistry.html