An experiment was done where a "primordial soup" of water, methane, carbon dioxide and ammonia was electrified. Following this, the material was found to contain many of the amino acids found in all living things on Earth
The purpose of this experiment was to: A) determine whether DNA could have formed from electrolysis.
B) determine whether DNA could have formed from amino acids.
C) determine whether DNA could have formed from water and methane.
D) determine whether amino acids could have formed naturally on Earth.
E) determine whether amino acids could have formed from water, methane, carbon dioxide and ammonia.
D
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Whether or not a planet like Mercury can hold a particular gas in its atmosphere depends on that planet's
a. ice cap. b. craters. c. escape velocity. d. its distance from the Sun as manifested in the temperature of the atmosphere. e. escape velocity and its distance from the Sun as manifested in the temperature of the atmosphere.
The thermal expansion of a solid is caused by
a. the breaking of bonds between atoms. b. increasing the amplitude of the atoms vibration. c. increasing the distance between equilibrium positions for the vibrating atoms. d. all of the above.
Which spectrum is shown above?
a. continuous
b. emission
c. absorption
d. blackbody
What is the next energy level that fills after the 4d energy level is full?
a. 5p c. 6s b. 4s d. 4f