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As they formed, due to their high temperatures and comparatively weak gravitational fields, which planets were unable to retain appreciable amounts of hydrogen, helium, and ammonia?
Q26: An instrument that measures wind speed is
Q28: Thermoclines in the ocean are best developed
Q51: Who is credited with formulating the doctrine
Q55: Examine the words and/or phrases below and
Q56: _ continental margins occur where oceanic lithosphere
Q67: An_ marks the site where old,
Q70: _develop where oceanic lithosphere bends downward and
Q87: Which feature is labeled Z in the
Q95: In the proto- solar system nebula, gravity
Q103: Light elements like hydrogen and helium form