Come on with measurement! by Rosanna Federa

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!!

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

Comprehension activity https://www.youtube.com/watch?v=XN7yJ_0IGBA 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?

Cookmetric

A recipe is similar to a lab report: we have to describe every passagge very carefully http://www.infoplease.com/spot/cookmetric1.html

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

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

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

PAY ATTENTION!! UK American English metre litre meter liter

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

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

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 https://www.youtube.com/watch?v=e0geXKxeTn4

mini-task Describe the displacement method, working in group

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

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

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)