1.
Bauxite is the ore from which ___________ is made.
Correct Answer
C. Aluminium
Explanation
Bauxite is a type of rock that contains high concentrations of aluminum minerals. It is the primary source of aluminum, which is extracted from bauxite through a refining process. Therefore, the correct answer is aluminium.
2.
In the first stage in the refining process, bauxite is refined to produce ______________.
Correct Answer
B. Alumina
Explanation
In the first stage of the refining process, bauxite is refined to produce alumina. Alumina is a white powder that is extracted from bauxite through a process called the Bayer process. It is the main component in the production of aluminum and is used in various industries, such as the production of ceramics, abrasives, and refractory materials. Alumina is also used in the manufacturing of aluminum metal through the Hall-Héroult process, where it is electrolyzed to produce pure aluminum.
3.
Most of Jamaica's bauxite is refined into alumina.
Correct Answer
A. True
Explanation
Most of Jamaica's bauxite is refined into alumina. This means that the majority of the raw bauxite ore mined in Jamaica goes through a refining process to produce alumina. Alumina is a white powder that is used to make aluminum, which has various industrial applications. Therefore, the statement is true as it accurately reflects the process of bauxite refining in Jamaica.
4.
Jamaica produces small quantities of aluminium.
Correct Answer
B. False
Explanation
Jamaica does not produce small quantities of aluminium. In fact, Jamaica is one of the largest producers of aluminium in the world. The country has vast reserves of bauxite, which is the main raw material for aluminium production. The mining and refining of bauxite in Jamaica contribute significantly to the country's economy. Therefore, the statement that Jamaica produces small quantities of aluminium is incorrect.
5.
Jamaica exports some bauxite unrefined.
Correct Answer
A. True
Explanation
Jamaica exports unrefined bauxite, which means that they send out bauxite in its raw form without any processing or refining. This suggests that Jamaica does not refine the bauxite within its own borders before exporting it to other countries.
6.
Jamaica's output per worker is high compared to most other countries where bauxite is mined.
Correct Answer
B. False
Explanation
The statement suggests that Jamaica's output per worker is high compared to other countries where bauxite is mined. However, the correct answer is false, indicating that Jamaica's output per worker is not high compared to most other countries. This implies that there are other countries where bauxite is mined that have a higher output per worker than Jamaica.
7.
Wages in the Jamaican bauxite industry are low compared to other countries where bauxite is mined.
Correct Answer
B. False
Explanation
The statement suggests that wages in the Jamaican bauxite industry are low compared to other countries. However, the correct answer is False. This means that wages in the Jamaican bauxite industry are not low compared to other countries where bauxite is mined.
8.
The Jamaican bauxite reserves are expected to last several decades.
Correct Answer
A. True
Explanation
The statement suggests that the bauxite reserves in Jamaica will be available for use for a significant amount of time in the future. This implies that there is a substantial amount of bauxite in Jamaica and it is being extracted at a sustainable rate. Therefore, it can be concluded that the statement is true.
9.
Open cast mining scars the landscape, making it unsightly.
Correct Answer
A. True
Explanation
Open cast mining involves the removal of large amounts of soil and rock from the surface of the earth to extract minerals. This process can result in significant damage to the landscape, leaving behind scars and altering the natural topography. The removal of vegetation and disruption of ecosystems can also contribute to the unsightliness of the area. Therefore, it is true that open cast mining scars the landscape, making it unsightly.
10.
In which of the following ways does the disposal of red mud affect the environment in Jamaica?
Correct Answer
D. All of the above
Explanation
The disposal of red mud affects the environment in Jamaica in multiple ways. Firstly, it makes the air unpleasant to breathe, possibly due to the release of toxic gases or fine particulate matter. Secondly, it pollutes water sources, contaminating them with harmful chemicals present in the red mud. Lastly, it kills vegetation, likely due to the high alkalinity or heavy metal content of the mud. Therefore, all of the above options are correct as they describe the various negative impacts of red mud disposal on the environment in Jamaica.