Oxygen

"screaming gummy bear"

Oxygen

21% of the Earth's atmosphere is oxygen

Oxygen

Fast Reactions:

Combustion: a rapid chemical reaction between oxygen and a fuel

Oxygen

Fast Reactions

Combustion: a rapid chemical reaction between oxygen and a fuel

e.g. woodgasoline

Oxygen

Slow Reactions

Cell Respiration: reaction of oxygen with glucose in our cells

Oxygen

Slow Reactions

Cell Respiration: reaction of oxygen with glucose in our cells

-provides all the energy to maintain life

Oxygen

Slow Reactions

Cell Respiration: reaction of oxygen with glucose in our cells

-provides all the energy to maintain life-heat released maintains body temperature

at 37oC

Oxygen

Slow Reactions

Rusting: a slow chemical change of iron reacting with oxygen and water