During which step in cosmic evolution were the chemical bases for life created?
A) particulate evolution
B) stellar evolution
C) chemical evolution
D) biological evolution
E) cultural evolution
B
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Each form element is called a(n) ______.
A. cell B. field C. tag D. label
Currently in the USA, SETI programs are mostly funded
A) privately B) by the US Government C) by the United Nations D) by the National Academy of Sciences
Ice cubes submerged at the bottom of a liquid mixture indicate that the mixture
A) fails to produce a buoyant force on the ice. B) has dissolved air in a liquid state. C) is composed of open-structured crystals. D) is less dense than ice.
A spherical volume of space has an electric field of intensity 170 N/C directed radially outward from it surface of radius 0.600 m. What is the net charge enclosed within this surface?
a. –6.8 nC c. 4.0 nC b. –4.0 nC d. 6.8 nC