The solar nebula theory supposes that:
A) the moons of all the planets were not formed from a nebula.
B) asteroids formed about half a billion years before the formation of the planets' moons.
C) the Sun formed about a billion years before the planets.
D) planets form in rotating disks of gas and dust around young stars.
D
You might also like to view...
The diamond ring effect is a characteristic of which phenomena?
a. full moon b. new moon c. lunar eclipse d. solar eclipse e. solar prominence
The mass density of normal air is, at a particular temperature, 
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
a. 
b. 
c. 
d. 
e. 
f. 
You are in the doctor's office and notice that the metal instrument tray feels much colder than the exam table you are sitting on. This is because
A. the tray actually is colder than the table. B. the exam table has a cushion inside, which is a good insulator. C. the metal conducts heat away from your hand more quickly than does the table.
The statement, "There are regions beneath the Earth's crust that will always be beyond the reach of scientific investigation," is
A) a fact. B) speculation. C) a scientific statement. D) a theory.