Question

evaluate
birth of a solar system
use your knowledge of the creation of the sun to circle the correct words to complete the paragraph.
about 4.6 billion years ago, the solar system started as a giant cloud of gas and dust called nuclear fusion/a solar nebula/the shockwave/a supernova. some event, such as a supernova/the creation of a planet/the formation of the sun/a black hole, caused a fusion/orbital/metallic/gravitational collapse at the center of the cloud. most of the dust and gas in the cloud collapsed on itself. it formed a supernova/elliptical orbit/spinning disk/spiral galaxy of gas and dust. the heat of this collapse caused shockwave/supernova/fusion/fission to occur, resulting in the development of the sun.

Explanation:

1. The solar system began as a giant cloud of gas and dust called a solar nebula (nuclear fusion is a process in stars, shockwave is a wave, supernova is an explosion—so solar nebula is the cloud).
2. A supernova (a stellar explosion) is a common event that triggers the collapse of a solar nebula (creation of a planet is too late, formation of the sun is the result, black hole is different).
3. Gravitational collapse (fusion is a process, orbital is about motion, metallic is about composition—gravity pulls the nebula in).
4. Spinning disk (supernova is an explosion, elliptical orbit is for planets, spiral galaxy is too big—collapsing nebula forms a spinning disk).
5. Fusion (specifically nuclear fusion; shockwave is a wave, supernova is an explosion, fission is splitting atoms—fusion is how the sun produces energy).

Answer:

1. a solar nebula
2. a supernova
3. gravitational
4. spinning disk
5. fusion