Author Question: Which statement correctly locates the formation of the Earth and the appearance of the first humans ... (Read 96 times)

Metfan725 · **on:** Jul 27, 2018

Which statement correctly locates the formation of the Earth and the appearance of the first humans on the cosmic calendar, which compresses the 14-billion year history of the universe into one year, where now is exactly midnight,

A) Earth forms in January, life begins in April, and humans appear in early December.
B) Earth forms in January, life begins in September, and humans appear in October.
C) Earth forms in early September, life begins in late September, humans appear a few hours before midnight, Dec 31.
D) Earth forms in early September, life begins in November, and humans appear on Dec 15.

Question 2

The Big Bang predicts that the universe should be 25 percent hydrogen and 75 percent helium.

Indicate whether the statement is true or false