Question

Please fill out all the gaps! Thank you!

Which dating Chronometric technique can be used? (Write the full name) A) Potassium – Argon dating           B) Carbon – 14 dating           C) Molecular dating

Event	Time period	Dating technique (s)
Rise of state societies	4,000
Agriculture	12,000 – 10,000
Cave painting	30,000
Homo sapiens	195,000 – present
Homo florensiensis	95,000 – 13,000
Homo neanderthalensis	230,000 – 30,000
First use of housing and clothing	400,000 ya
First recorded burial	800,0000 – 500,000
Rapid brain expansion	800,000 – 200,000 ya
Homo heidlbergensis	800,000 – 200,000
Homo erectus leaves Africa	1.8 mya
Homo erectus	1.8 mya – 300,000
Homo ergaster	1.9 mya – 1.4 mya
Homo habilis	2.4 mya – 1.5 mya
Stone tools	2.6 mya
Australopithicus robustus	2 mya – 1.5 mya
Australopithicus boisei	2.1 mya – 1.1 mya
Australopithicus garhi	2.6 mya – 2.5 mya
Australopithicus afarensis	3.9 mya – 3 mya
Australopithicus anamensis	4.2 mya – 3.9 mya
Ardipithicus ramidus	5.8 mya – 4.4 mya
Sahelathropus tchadensis	7 mya
Human and chimps diverge	Up to 7 million years ago

Answer 1

Event Time period Dating technique (s) Rise of state societies 4,000 Carbon – 14 dating    Agriculture 12,000 – 10,000 Carbon – 14 dating    Cave painting 30,000 Carbon – 14 dating    Homo sapiens 195,000 – present Molecular dating Homo florensiensis 95,000 – 13,000 Molecular dating Homo neanderthalensis 230,000 – 30,000 Molecular dating First use of housing and clothing 400,000 ya Potassium – Argon dating        First recorded burial 800,0000 – 500,000 Potassium – Argon dating        Rapid brain expansion 800,000 – 200,000 ya Potassium – Argon dating        Homo heidlbergensis 800,000 – 200,000 Potassium – Argon dating        Homo erectus leaves Africa 1.8 mya Potassium – Argon dating        Homo erectus 1.8 mya – 300,000 Potassium – Argon dating        Homo ergaster 1.9 mya – 1.4 mya Potassium – Argon dating        Homo habilis 2.4 mya – 1.5 mya Potassium – Argon dating        Stone tools     2.6 mya Potassium – Argon dating        Australopithicus robustus 2 mya – 1.5 mya Potassium – Argon dating        Australopithicus boisei 2.1 mya – 1.1 mya Potassium – Argon dating        Australopithicus garhi 2.6 mya – 2.5 mya Potassium – Argon dating        Australopithicus afarensis 3.9 mya – 3 mya Potassium – Argon dating        Australopithicus anamensis 4.2 mya – 3.9 mya Potassium – Argon dating        Ardipithicus ramidus 5.8 mya – 4.4 mya Potassium – Argon dating        Sahelathropus tchadensis 7 mya Potassium – Argon dating        Human and chimps diverge Up to 7 million years ago Potassium – Argon dating        Explanation: Carbon dating cannot be used for fossils which are more than 60,000 years old because very minute amount of C-14 remains after almost 9 half-lives so that it is almost impossible to detect such low amount. Potassium-argon dating is can be used to measure the timing from 4.3 billion years to about 100,000 years before the present.