Gold is found in quartz or redistributed sediments. Gold is extracted using the deep shaft method. Gold ore is crushed, dissolved and then precipitated to obtain the gold. Gold is used in making of jewellery and ornaments, in chemical industries, in density and for medals. Gold earns export revenue, has led to infrastructure development and provide employment. Rising costs of production, high labour costs and low quality gold are some of problems facing gold mining.
Diamonds are associated with volcanic activities. They occur in igneous rocks in pipes. The ore is blasted crushed and washed. It is then passed through filtering screen and then through a special solution. Diamonds are used in the jewellery industry, for polishing, for drilling, and for cutting instruments. Diamonds; earn foreign exchange, have led to development of towns, have created employment and contributed to development of infrastructure. The problems facing diamond mining to include exhaustion, unstable world market prices, high costs of processing and inadequate labour.
Kavungya answered the question on June 7, 2019 at 10:47
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Explain four effects of land dereliction on the environment.
(Solved)
Explain four effects of land dereliction on the environment.
Date posted:
June 7, 2019
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Explain four problems, which Zambia experiences in the exportation of copper.
(Solved)
Explain four problems, which Zambia experiences in the exportation of copper.
Date posted:
June 7, 2019
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Describe carbonaceous rocks.
(Solved)
Describe carbonaceous rocks.
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June 7, 2019
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List two examples of extrusive igneous rocks.
(Solved)
List two examples of extrusive igneous rocks.
Date posted:
June 7, 2019
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Differentiate between regional metamorphism and contact metamorphism.
(Solved)
Differentiate between regional metamorphism and contact metamorphism.
Date posted:
June 7, 2019
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Name two examples of organic sedimentary rocks and where found in Kenya.
(Solved)
Name two examples of organic sedimentary rocks and where found in Kenya.
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June 7, 2019
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State two main conditions that influence the characteristics of igneous rocks.
(Solved)
State two main conditions that influence the characteristics of igneous rocks.
Date posted:
June 7, 2019
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Give an example of each of the following types of igneous rocks
(i) Plutonic rocks
(ii) Hypabyssal rocks
(iii) Volcanic rocks
(Solved)
Give an example of each of the following types of igneous rocks
(i) Plutonic rocks
(ii) Hypabyssal rocks
(iii) Volcanic rocks
Date posted:
June 7, 2019
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Answers (1)
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Describe the following characteristics of minerals (i) Colour (ii) Cleavage (iii) Hardness
(Solved)
Describe the following characteristics of minerals
(i) Colour
(ii) Cleavage
(iii) Hardness
Date posted:
June 7, 2019
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Why is reconnaissance important?
(Solved)
Why is reconnaissance important?
Date posted:
June 7, 2019
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Explain five problems one would encounter on field study in a forest?
(Solved)
Explain five problems one would encounter on field study in a forest?
Date posted:
June 7, 2019
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Formulate five suitable objectives for field study on a visit to a forest.
(Solved)
Formulate five suitable objectives for field study on a visit to a forest.
Date posted:
June 7, 2019
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What is the importance of carrying samples from the field to the school?
(Solved)
What is the importance of carrying samples from the field to the school?
Date posted:
June 7, 2019
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State five ways in which you would prepare for field study to a weather.
(Solved)
State five ways in which you would prepare for field study to a weather.
Date posted:
June 7, 2019
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List some topics in physical geography on which you can carry out a field study.
(Solved)
List some topics in physical geography on which you can carry out a field study.
Date posted:
June 7, 2019
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You are supposed to carry out a field study on the uses of vegetation in the area around your school.
(a) State three reasons why it...
(Solved)
You are supposed to carry out a field study on the uses of vegetation in the area around your school.
(a) State three reasons why it would be necessary to visit the area before the day of the study.
(b) Give four uses of vegetation you are likely to identify during the study.
(c) Why is it necessary to sample part of the forest for the study?
(d) State three methods you would use to record the information.
Date posted:
June 7, 2019
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You intend to carry out field study on population in the local open air market,
(i) State three reasons why it would be necessary for you...
(Solved)
You intend to carry out field study on population in the local open air market,
(i) State three reasons why it would be necessary for you to visit the market
before actual field study.
(ii) Give two methods you would use to collect information on pollution. ,
(iii) State three follow up activities necessary for the study.
Date posted:
June 7, 2019
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Marks 72, 60, 65, 70, 65, 80, 65, 70, 80, 84, 63, 75, 63, 71, 74
Use the data above to find out mean and mode.
(Solved)
Marks 72, 60, 65, 70, 65, 80, 65, 70, 80, 84, 63, 75, 63, 71, 74
Use the data above to find out mean and mode.
Date posted:
June 7, 2019
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Answers (1)
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Explain the following methods of data recording.
- Tabulation
- Photographing
- Tape recording
- Tallying
(Solved)
Explain the following methods of data recording.
- Tabulation
- Photographing
- Tape recording
- Tallying
Date posted:
June 7, 2019
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Explain oral interview method.
(Solved)
Explain oral interview method.
Date posted:
June 7, 2019
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