Changes in Matter in The Presence or Absence of Oxygen

 

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The presence and absence of oxygen has various effects on matter. Among these common ones that you readily see are combustion and rusting .

 

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Caused by the reaction of iron with oxygen present in the air. This kind of reaction is slower than the rate of combustion. The amount of rust formed in an iron depends on moisture and humidity of the surroundings.

 

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Apply paint on the

material  Always wipe the material with a clean dry cloth after use.

 

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The change in color of the inner fleshy part of the apple is due to its exposure to oxygen.

 

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A certain fish pond owner reported that there has been a fish kill in a pond that he owns. The fisheries bureau investigated the incident, only to find out that the fish pond was overly populated. What do you think is the connection of the overpopulation of the fish pond to the fish kill that occurred?

 

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1. It is caused by the reaction of iron with oxygen present in the air

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2-4. What are the three elements needed for a fire to occur?  5. It is an ability of a material to burn.

 

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6-7. What are the two factors that influence the formation of rust?

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8. Where can we find oxygen?

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9. What gives oxygen?  10.