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Questions and Answers
What is the main component of the earth's lithosphere according to the text?
What is the main component of the earth's lithosphere according to the text?
- Air
- Water
- Plants
- Rocks (correct)
Why are only a few metals found in the free state in nature?
Why are only a few metals found in the free state in nature?
- They are extremely rare
- Because they form compounds easily
- Due to their high cost
- They react rapidly with air and water (correct)
What are impurities of sand and soil in an ore referred to as?
What are impurities of sand and soil in an ore referred to as?
- Gangue (correct)
- Minerals
- Elements
- Ores
Why is it more economical to obtain metals from ores rather than from the free state?
Why is it more economical to obtain metals from ores rather than from the free state?
Which term is used for minerals that contain a high proportion of metal?
Which term is used for minerals that contain a high proportion of metal?
What is the primary process by which minerals are formed according to the text?
What is the primary process by which minerals are formed according to the text?
What is the main reason why all minerals are not considered ores?
What is the main reason why all minerals are not considered ores?
'Metal mineral' and 'non-metal mineral' refer to minerals based on their content of what?
'Metal mineral' and 'non-metal mineral' refer to minerals based on their content of what?
'Gangue' is a term used for the impurities of what substances in an ore according to the text?
'Gangue' is a term used for the impurities of what substances in an ore according to the text?
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Study Notes
Minerals and Ores
- The main component of the earth's lithosphere is rocks.
- Only a few metals are found in the free state in nature because most metals react with other elements to form compounds.
- Impurities of sand and soil in an ore are referred to as gangue.
- It is more economical to obtain metals from ores rather than from the free state because ores are more abundant and concentrated sources of metals.
- Minerals that contain a high proportion of metal are referred to as ores.
- The primary process by which minerals are formed is through the cooling and solidification of magma.
- Not all minerals are considered ores because ores are minerals that can be economically extracted for their metal content.
- 'Metal mineral' and 'non-metal mineral' refer to minerals based on their content of metal.
- Gangue is a term used for the impurities of sand and soil in an ore.
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