What evidence do we have that life arose quickly?
What will be an ideal response?
Because of the period of heavy bombardment, it would have been difficult for life to exist more than 3.9 billion years ago. Combined with evidence from fossils of life 3.5 billion years ago and carbon isotope evidence dating back to 3.85 billion years, it seems that it only takes a few hundred million years for life to spring into existence.
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Addition by 1. Components: Three vectors, src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q38g6.jpg" style="vertical-align: -5.0px;" />?5.5 m-2.5 m
A. 24° above the +x-axis
B. 24° below the +x-axis
C. 66° above the +x-axis
D. 66° below the +x-axis
, 
, and 
, have the components shown in the table. What angle does the resultant of these three vectors make with the +x-axis??x componenty component
?-3.5 m4.5 m
?0.00 m-6.5 m
Why are there fewer large craters on the seafloor than on the continents?
A) The seafloor crust is younger than the continental crust. B) The oceans slow large impactors and prevent them from making craters. C) The oceans erode away craters faster than erosion processes on land. D) Large impactors primarily strike land masses. E) Large impactors aim for life-forms such as dinosaurs.
We can measure the parallax of most stars in our galaxy
Indicate whether the statement is true or false
According to the philosophical ideas associated with quantum theory,
A) science describes the objective universe, uninfluenced by humans. B) microscopic particles form the fundamental reality. C) microscopic particles do not have precise positions or velocities. D) All of the above. E) None of the above.