1
00:00:00,560 --> 00:00:22,000
Hello, we are going to speak about metals. Metals are extremely important in the industry due to their mechanical resistance and conductivity and they have another characteristics, properties of metals as metallic sheen, hardness, density, tenacity, etc.

2
00:00:22,000 --> 00:00:35,000
This picture shows us the classification of metals you can see in ferrous or non-ferrous is the most important characteristic.

3
00:00:35,000 --> 00:00:51,000
Metals and non-metals are present in life every day but we need to distinguish between them and their properties in order to know what are more important or more useful for us.

4
00:00:51,000 --> 00:01:00,240
us. Ferocious metals are those whose main component is iron. Iron is very important

5
00:01:00,240 --> 00:01:09,140
and very important on the earth crust. Iron alloys are created adding carbon. This addition

6
00:01:09,140 --> 00:01:19,719
improves the properties, hardener, resistance, etc. There are other important non-ferrous

7
00:01:19,719 --> 00:01:29,219
as copper brass bronze aluminium and others like a gold silver platinum were

8
00:01:29,219 --> 00:01:34,319
going to improve our knowledge try to investigate and make a new presentation

9
00:01:34,319 --> 00:01:41,739
and exposing to the class in front of the class and made is an activities in

10
00:01:41,739 --> 00:01:50,480
order to complete a puzzle so sentence and it would be more easy