Author Question: Interstellar dust consists mostly of ________. A) the same tiny particles found in household dust ... (Read 140 times)

cdr_15 · **on:** Jul 27, 2018

Interstellar dust consists mostly of ________.

A) the same tiny particles found in household dust
B) tiny grains of water ice
C) ozone smog
D) microscopic particles of carbon and silicon
E) hydrogen and helium atoms

Question 2

What do we mean by accretion in the context of planet formation?

A) the formation of moons around planets
B) the solidification of ices, rocks, and metal from the gas of the solar nebular
C) the growth of the Sun as the density of gas increased in the center of the solar nebula
D) the growth of planetesimals from smaller solid particles that collided and stuck together