In your textbook, read about collapsing interstellar clouds and Sun and planet formation.
Write the letter of the item in Column B next to its matching item in Column A.
Column A
16. Gas and dust from which stars and planets form
17. Force that pulls matter together
18. Solid bodies hundreds of kilometers in diameter that
merged to form the planets
19. Believed to be the first large planet to develop
20. Main element in early interstellar clouds
21. Lacking in satellites because of proximity to the Sun
Column B
a. inner planets
b. hydrogen
c. planetesimals
d. gravity
e. interstellar cloud
f. Jupiter