1. THE MATTER OF THE UNIVERSE

2. THE MATTER AND THEIR PROPERTIES The materials that form the universe : The whole known universe is formed by the same materials. Matter : It is everything that has mass and volume. Substance : It is each one of the different matter types. Properties of matter: - General properties: They are those that all matter shares and allows us to recognize matter. These are general properties: - Mass : it is the quantity of matter that a body has. - Volume : it is the space that occupies this matter. - Specific properties : They are those that allow us to differentiate some materials from others. - Some specific properties are: the colour, the shine, the size, the form, etc...

3. MEASURE OF MATTER: Magnitude : It is any property of matter that you can measure, for example: the weight, the length, the speed, etc. To measure : It is to compare a magnitude with the unit, for example: 3 kg., 2 m., 50 km/h, etc. International System of Units (S.I.): Almost all the countries of the world have adopted this system of units, so that almost everybody measures in the same way.

4. THE DENSITY: Density: It is the relationship between the mass of a body and the volume that it occupies. The most important unit to measure the density is the g / cm 3 , it is also used kg / m 3 . Mass : it is the quantity of matter that a body has. The mass doesn't vary from one place to another Weight : It is the force with which the Earth attracts a body. The weight varies from one place to another Volume : It is the space that a body occupies, or how big or small that it is, the most important unit is the m 3 , although the smallest bodies are measured in cm 3 .

5. Materials The objects are manufactured with multiple materials. Each material is selected carefully for the function of its properties. The growing industrialization demands that we look for new materials to manufacture novel objects or to improve old materials. Our scientific knowledge also allows us to manufacture substances that have never existed. For example recently they have invented: medications, insecticides,etc..