1
00:00:01,199 --> 00:00:15,470
Oxidation What is oxidation?

2
00:00:15,470 --> 00:00:20,489
Oxidation is caused when are exposed to the air some metals have a chemical property that

3
00:00:20,489 --> 00:00:22,649
makes them react.

4
00:00:22,649 --> 00:00:26,910
When it happens, they turn into rust.

5
00:00:26,910 --> 00:00:30,350
Here are some experiments.

6
00:00:30,350 --> 00:00:33,530
For example, an apple can oxidate.

7
00:00:33,530 --> 00:00:39,429
The first minute is nice, but the thirteenth minute is oxidated.

8
00:00:39,429 --> 00:00:42,630
This is caused by the air.

9
00:00:42,630 --> 00:00:46,189
A bicycle also can oxidate.

10
00:00:46,189 --> 00:00:52,289
The first year is new, but the seventh year is oxidated.

11
00:00:52,289 --> 00:00:57,310
Because when the air is in contact with the metal, it can oxidate.