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

Verified
Correct Answer:
Verified
Q19: Consider the following statement,and explain whether or
Q30: One light-year is about 10 trillion kilometers.
Q79: Suppose we look at a photograph of
Q80: Jupiter is about 5 AU from the
Q81: How do the speeds at which we
Q82: How long does it take the Earth
Q85: Why do the patterns of the stars
Q87: The speed of light is about 300,000
Q88: Relative to the age of the universe,
Q89: Which of the following has your "cosmic