1. MATTER 1. The properties of matter.

2. Air: is it matter? Why does a full air balloon weigh more than an empty balloon?

3. Why water doesn’t enter in the glass?

4. Properties of matter Length. Surface or area. Volume. Mass. Density. Temperature.

5. Length Length is the distance between two bodies.  metres It is measured in metres (m).  We use rulers and measuring tapes when we measure length.  1 km = 1000 m 1 hm = 100m Length units 1 dam = 10 m 1 dm = 0,1 m 1 cm = 0,01m 1 mm = 0,001m

6. Surface Surface is the space occupied by two dimensions: length and width.  It is measured in square metres (m 2 ).  Surface units 1 km 2 = 1000000 m 2 1 hm 2 = 10000m 2 1 dam 2 = 100 m 2 1 dm 2 = 0,01 m 2 1 cm 2 = 0,0001m 2 1 mm 2 = 0,000001m 2

7. Volume Volume is the total space occupied by a body.  It is often measured in litres although the International System volume unit is the cubic metre (m 3 ).  1 m 3 = 1000 dm 3 = 1 kL 1 dm 3 = 1000 cm 3 = 1 L 1 cm 3 = 1 mL Volume units

8. Volume The volume of geometric solids can be obtained using mathematical formulae.  The volume of liquids can be measured using measuring cylinders.

9. Volume How can you find out the volume of an irregular solid like a stone? 

10. Mass Mass is the amount of matter in a body.  It is measured in kilograms and grams.  1 t = 1000 kg 1 kg = 1000 g 1 hg = 100g Mass units 1 dag = 10 g 1 dg = 0,1 g 1 cg = 0,01g 1 mg = 0,01g

11. Mass The mass can be measured with scales. 

12. Density Density measures how concentrated the mass is.  The density is expressed in kg/m 3 or in g/cm 3  To measure the density of an object we can determine the mass and the volume of the object and divide both measurements:  Density = Mass Volume

13. Density Density = Mass Volume 240 : 1000 = 0,24 g /cm 3 11290 : 1000 = 11,29 g /cm 3 1000 cm 3 cork lead

14. Air 0,012 Alcohol 0,8 Water 1 Some substances density (g/cm 3 ) Aluminium 2,7 Copper 8,9 Silver 10,5 Lead 11,3 Iron 7,8 Mercurio 13,6 Gold 19,3

15. Matter is all that which occupies a space and which can be weighed. Same volume and different mass. Same mass and different volume. Same shape and different matter. Same matter and different shapes.