1. Come on with measurement!
by Rosanna Federa

2. Warm- up: brainstorming
Form group of 4-5 student and write down all the English words you know about measurement ( 10 minutes )
At the end we are collecting them all together
IN ENGLISH PLEASE!!

3. Groups results
Density lenght weight size volume grade kelvin Celsius Fahrenheit
width chemistry
Scale temperature
Metre/meter litre/liter centimetre time mass second minute libre

4. Comprehension activity
Comprehension activity
Answer the following questions or fill in the gaps:
1.What does measure things allow us to do?
2.The better we measure, the better
3.What is infested the raging river in the chasm with?
4.What can we measure in human body?

5. Cookmetric

6. A recipe is similar to a lab report: we have to describe every passagge very carefully

7. MEASUREMENT
Process of associating numbers with physical quantities and phenomena.
To measure something you need
an instrument,
a quantity to measure
a quantity of the same type of the one you have to measure
This last is called measurement unit

8. SI- THE INTERNATIONAL SYSTEM
SI: International decimal system of measures, derived from the metric system
Adopted by the 11th General Conference on Weight and Measures in 1960
It is abbreviated SI in all languages

9. SI - The International system Base units
Abbreviation
Physical quantity
metre m
length
second s
time
kilogram kg
mass
kelvin K
temperature
ampere A
electric current
candela cd
luminous intensity
mole
mol
amount of substance

10. PAY ATTENTION!! UK
American English
metre
litre
meter
liter

11. PHYSICAL QUANTITIES MASS (m)
Resistance that a body offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force.
WEIGHT (W)
Related to mass,but different from it. Weight is the force exerted on matter by the gravitational attraction , and so it varies from place to place W = m x g
g= accelleration of gravity

13. DIFFERENCES btw MASS-WEIGHT
UNIT
KILOGRAM (Kg)
NEWTON (N)
INSTRUMENT
SCALE
DYNAMOMETER
VARIATION WITH POSITION NO
YES

14. PHYSICAL QUANTITIES VOLUME (v)
Space occupied by a body; it is measured and expressed in different ways for solids and liquids
SOLIDS
LIQUIDS
unity
m3 (cubic metre)
l (litre)
measurement method
- Regular objects: geometric formulas
-Irregular objects: displacement method
-Graduated
containers

15. mini-task
Describe the displacement method, working in group

16. PHYSICAL QUANTITIES
DENSITY (d)
mass of a unit volume of a material substance,
expressed as kilograms per cubic metre (kg/m3) in SI, or in g/cm3.
d=m/v
Specific for every substance
Reversal formulas:
m=d x v v= m/d

17. Find the density of a body with mass=162 g and volume=279 cm3
Exercises
Find the density of a body with mass=162 g and volume=279 cm3
Find the mass of a body with density= 1,28 kg/m3 and volume= 0,32 m3
Find the volume of a body with mass= 2,04 Kg and density=5,5g/cm3

18. PHYSICAL QUANTITIES
TEMPERATURE (T)
It indicates the particles movement: a hot body particles vibrate faster than a cold body ones
It is measured using different temperature scales
FAHRENHEIT (°F) CELSIUS (°C) KELVIN (K)