Phase Inspection. 1  Inspect the electrical system as a whole including outlets, GFCI & AFCI protection, switches, fixtures, panels, circuit breakers & disconnects. 2  Inspect the plumbing for any visible leaks, drips, water supply, proper venting of the drains and waste lines.
Answer: The most abundant element in the universe is hydrogen, which makes up about 3/4 of all matter! Helium makes up most of the remaining 25%. Oxygen is the third most abundant element in the universe. All of the other elements are relatively rare. The chemical composition of the earth is quite a bit different from that of the universe. The most abundant element in the earth's crust is oxygen, making up 46.6% of the earth's mass.
The two most common elements in the universe are also the two smallest ones: hydrogen and helium. Hydrogen is by far the most common element in the universe because it was the first element in the universe to be created.The Big Bang caused all of the hydrogen in the universe to be formed at the beginning.This hydrogen was then the basis for all heavier elements to be formed through fusion reactions. Since helium is formed by the fusion of two hydrogen atoms, it is the second most common element in the universe.The heavier elements like iron are much less common in the universe since they require more fusion reactions to occur. llltkl | College Teacher | (Level 3) Valedictorian.ince helium is formed by the fusion of two hydrogen atoms, it is the second most common element in the universe. The heavier elements like iron are much less common in the universe since they require more fusion reactions to occur. llltkl | College Teacher | (Level 3) Valedictorian.