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| Aluminum is an abundant
(2) metal (1) that comes from bauxite
(4). Bauxite is an ore (5) that looks
like clay (6), which
(1) contains aluminum (7) and several
(8) other substances (9). Workmen extract
these other substances (10) by grinding (11)
the bauxite and then putting them in tanks (12).
The tanks are pressurized (13) so that the
other substances form a mass (14). To remove
(15) the mass they use filters (16),
A liquid will remain (17) and they'll put
it through several other processes (18). Finally,
a white (21) powdery (20) chemical yields (19).
This mixture (23) is called alumina
(22), which contains aluminum (24)
and oxygen (25). The workmen then separate
the aluminum from the oxygen (26) by using
electricity (27). This finally produces the
metal (28).
Missing: # 3 has many usesAdded IUs: Content errors: 1. "looks like clay which contains aluminum and several other substances" imples that readers already recognize "clay which contains..." In other words, it is not the bauxite that contains aluminum and several other substances," but rather the clay which we asked to compare it to. |
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