What was the frost line of the solar system?
A) the distance from the Sun where temperatures were low enough for metals to condense, between the Sun and the present-day orbit of Mercury
B) the distance from the Sun where temperatures were low enough for rocks to condense, between the present-day orbits of Mercury and Venus
C) the distance from the Sun where temperatures were low enough for hydrogen compounds to condense into ices, between the present-day orbits of Mars and Jupiter
D) the distance from the Sun where temperatures were low enough for asteroids to form, between the present-day orbits of Venus and Earth
E) the distance from the Sun where temperatures were low enough for hydrogen and helium to condense, between the present-day orbits of Jupiter and Saturn
Question 2
There is very little interstellar gas or dust in most elliptical galaxies.
Indicate whether the statement is true or false
General representation of the autonomic nervous system.
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