Approximate age of earth is ________?
A. 4.14 billion years B. 4.64 billion years C. 4.54 billion years D. 4.34 billion years
A. 4.14 billion years B. 4.64 billion years C. 4.54 billion years D. 4.34 billion years
A. Asia B. Africa C. Europe D. Australia
A. 3 B. 2 C. 4 D. 6