Origin and the structure of the earth grade 12

Universe and the Solar System
Content Standard
The learned demonstrate an understanding of the formation of the universe and the solar system

1. stars Dust Clouds

2. Planets Galaxy

3. * Is the leading explanation for how the universe began. Simply put, it says the universe as know it started with an infinitely hot and dense single point that inflated and stretched- first at unimaginable speeds, and then at a more measurable rate – over the next 13.7 billion years to the still expanding cosmos that we know today.

4. PULSATING UNIVERSE THEORY - is a cosmological model that suggests the universe undergoes a series of expansions and contractions, akin to the beating of a heart or a pulsation. This theory posits that the universe goes through cycles of expansion, followed by contraction, leading to a repetitive pattern of “big bangs” and “big crunches”.