Get premium membership and access questions with answers, video lessons as well as revision papers.
1.Geological Problems- scientists have names for periods of past time characterized by successive types of plants and animals, and by climatic changes.
2.Chemical Dating- such as radio-carbon dating and potassium-argon method. Dating measures the use of decay potassium to give out the gas argon.
3.Radio-carbon dating measures the rate of decay carbon fossils and organic substance.
Hence the amount of argon-40 compared to the account of potassium gives direct measures of age.
4.Potassium-argon method- is used to date volcanic ash. Potassium is emitted during volcanic eruptions. This method is also used to date minerals containing potassium. As soon as the potassium is deposited, the radioactive potassium-40 immediately begins to decay into the gas argon. The argon is retained in the mineral or rock unless there is earth movement, given that the rate of decay of potassium is unknown, the amount of argon-40 compared with the amount of potassium, v=gives a direct measure of age.
5.Stratigraphy-the study and interpretation layers of rocks successfully deposited at a place (sedimentation).
6.Fission-Track Dating- the age of minerals and glass as estimated by observing the tracks made in them by the fission fragment of the uranium made that they contain.
7.Lexico- Statistics Dating- the study of vocabulary of languages with the interest to determine their age and their historical lines with other languages.
8.Statistical Dating-the use of calculation using a system of arranging the length of generation can be determined for a particular society.
9.Genetics: genetics is the scientific study of heredity and the variation of inherited characteristics.
It therefore studies how characteristics are passed from parents to their offspring’s through their genes (this is known as hereditary).
Moraa orina answered the question on November 15, 2018 at 18:04
- Explain how archaeologists locate a historical site.(Solved)
Explain how archaeologists locate a historical site.
Date posted: November 15, 2018. Answers (1)
- Explain oral traditions, linguistics, anthropology and archaeology which are unwritten sources of information giving advantages and limitations in each(Solved)
Explain oral traditions, linguistics, anthropology and archaeology which are unwritten sources of information giving advantages and limitations in each
Date posted: November 14, 2018. Answers (1)
- State the categories of sources of information on history and government.(Solved)
State the categories of sources of information on history and government.
Date posted: November 14, 2018. Answers (1)
- Explain the meaning of government and explain the three arms of government(Solved)
Explain the meaning of government and explain the three arms of government.
Date posted: November 14, 2018. Answers (1)
- Define (i) History (ii) Pre-history(Solved)
Define (i) History (ii) Pre-history
Date posted: November 14, 2018. Answers (1)
- Describe the extent to which customs are source of law in Kenya(Solved)
Describe the extent to which customs are source of law in Kenya.
Date posted: November 9, 2018. Answers (1)
- What are the reasons for migration of Eastern Bantu into Kenya before 1800?(Solved)
What are the reasons for migration of Eastern Bantu into Kenya before 1800?
Date posted: November 9, 2018. Answers (1)
- What are the benefits of local authorities in Kenya?(Solved)
What are the benefits of local authorities in Kenya?
Date posted: November 9, 2018. Answers (1)
- Name the branches of local governments in Kenya (Solved)
Name the branches of local governments in Kenya
Date posted: November 9, 2018. Answers (1)
- What factors facilitated European conquest of African countries in the 19th century(Solved)
What factors facilitated European conquest of African countries in the 19th century.
Date posted: November 9, 2018. Answers (1)
- Explain the reasons why Europeans were interested in Africa after 1880(Solved)
Explain the reasons why Europeans were interested in Africa after 1880.
Date posted: November 9, 2018. Answers (1)
- Define the following terms (a)Archaeology (b)Linguistics (c)Anthropology (d)Evolution (e)Natural selection(Solved)
Define the following terms (a)Archaeology (b)Linguistics (c)Anthropology (d)Evolution (e)Natural selection
Date posted: November 9, 2018. Answers (1)
- What are the importance of Karl marx,Adam Smith's and W.W Rostow theories in economic development?(Solved)
What are the importance of Karl marx,Adam Smith's and W.W Rostow theories in economic development?
Date posted: November 2, 2018. Answers (1)
- State two political responsibilities of a Kenyan citizen.(Solved)
State two political responsibilities of a Kenyan citizen.
Date posted: October 28, 2018. Answers (1)
- Identify two commissions established under the New constitution of 2010. (Solved)
Identify two commissions established under the New constitution of 2010.
Date posted: October 28, 2018. Answers (1)
- Name two Arab families which ruled the Kenyan coast on behalf of Oman.(Solved)
Name two Arab families which ruled the Kenyan coast on behalf of Oman.
Date posted: October 28, 2018. Answers (1)
- Challenges facing implementation of history and government curriculum in Kenyan secondary schools(Solved)
Challenges facing implementation of history and government curriculum in Kenyan secondary schools.
Date posted: October 26, 2018. Answers (1)
- Describe six constitutional amendments which took place in Kenya between 1964 and 2010.(Solved)
Describe six constitutional amendments which took place in Kenya between 1964 and 2010.
Date posted: October 26, 2018. Answers (1)
- Effects of spread of Islam in Kenya before 1500 AD(Solved)
Effects of spread of Islam in Kenya before 1500 AD
Date posted: October 24, 2018. Answers (1)
- Identify two communities which were entitled to Kenyan citizenship by the independence constitution of Kenya?(Solved)
Identify two communities which were entitled to Kenyan citizenship by the independence constitution of Kenya?
Date posted: October 22, 2018. Answers (1)