A. light / heavier
In the young universe, light elements such as hydrogen and helium formed stars like the sun, while heavier elements formed the building blocks of our solar system's planets, moons, and asteroids.
In the young universe, _____ elements such as hydrogen and helium formed stars like the sun while _____ elements formed the building blocks of our solar system's planets, moons, and asteroids.
A.
light / heavier
B.
heavy / lighter
1 answer