what did scientist use to determine earth age

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what did scientist use to determine earth age	0.04	0.7	2491	14	45
what	1.64	1	7378	19	4
did	0.14	0.8	4717	52	3
scientist	1.69	0.3	8437	46	9
use	0.12	0.3	5451	77	3
to	1.45	0.4	3102	46	2
determine	1.98	0.5	8909	83	9
earth	0.62	0.8	7033	42	5
age	0.25	0.3	8138	48	3

Keyword	CPC	PCC	Volume	Score
what did scientist use to determine earth age	1.13	1	2685	23
how was the age of earth determined	0.1	0.7	8156	96
how scientists estimate the age of earth	1.79	0.8	7412	69
how to determine age of earth	0.85	0.9	1955	69
how was the earth's age determined	1.4	0.8	3708	15
who calculated the age of earth	0.11	0.1	8919	99
what evidence supports the age of earth	0.13	0.3	7978	10
who discovered the age of the earth	0.27	0.2	9411	43
how scientists estimate earth's age	0.23	1	9449	25
attempts at determining earth age	0.47	0.7	1424	7
how is the age of earth measured	0.81	0.8	7378	79
evidence for the age of the earth	1.66	0.7	2018	52
who calculated earth's age	1.35	0.9	8122	94
age of the earth science	0.34	0.2	5053	12
how do we know the earth's age	0.67	0.5	5575	64
estimate the age of the earth	1.94	0.1	9613	17
who discovered how old the earth is	1.7	0.7	2157	71