Question

Brian uses trial and observation to figure out how to use the hatchet and other ingredients to make a fire. study the text to describe what he tried to do and what he observed .
He knows

Answer 1

He is aware of that fire place side desires gasoline and oxygen. Brian realizes that he desires to blow at the fire.

What do you mean by oxygen?

Oxygen is the chemical detail with the symbol O and atomic number 8. It is a member of the chalcogen group the periodic table, a highly reactive nonmetal, and an oxidizing agent that with no trouble forms oxides with maximum factors in addition to with other compounds. Oxygen is Earth's maximum ample detail, and after hydrogen and helium, it's far the third-maximum ample detail with inside the universe. At trendy temperature and pressure, atoms of the detail bind to shape dioxygen, a drab and odorless diatomic fueloline with the formula O. Diatomic oxygen fueloline presently constitutes 20.95% of the Earth's atmosphere, aleven though this has modified considerably over lengthy intervals of time. Oxygen makes up nearly 1/2 of of the Earth's crust within side the shape of oxides.

Many principal lessons of natural molecules in residing organisms comprise oxygen atoms, such as proteins, nucleic acids, carbohydrates, and fats, as do the principal constituent inorganic compounds of animal shells, teeth, and bone.

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