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| Aluminum is a very
useful (3) and abundant (2) metal (1).
It comes from bauxite (4), which is an ore
(5) that is similar in appearance to clay
(6). Aluminum is extracted (10) from the bauxite
(7), which contains many (8) other substances
(9) as well. The bauxite is ground (11)
up and placed in pressurized (13) tanks (12).
The non-aluminum substances form a mass (14)
in the tanks and is then removed (15). The
remains are then (1) filtered
(16) and a liquid is left (17). After
several
more processes (18) a powdery (20),
white (21) chemical called alumina
(22) remains (19). This alumina is
a mixture (23) that contains
aluminum (24) and oxygen (25). The
oxygen is then separated (26) from the aluminum
by use of electricity (27). This process then
yields
a metal (28) with a bright (31), silvery (32)
luster (30) that can be found in many different
(1) forms. (33)
Missing: # 29 "light"Added IUs: #1 "different"Content errors: 1) The filters are used to remove the mass, not after the mass is removed. |
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