1. The theme: What do we measure? Speaking: Current events. Grammar: Adjectives

1. The theme: What do we measure?
2. Speaking: Current events.
3. Grammar: Adjectives
Measurement is one of the three methods of science. To measure things, we compare them with their units. A unit is an accepted measurement. Scientific units are the same all around the world. So they are international. Some units are basic measurements are explained. Their units are written in brackets.

1. 
   LENGTH: Measurement from end to end of an object. (metre)
   
2. 
   MASS: Measurement of the amount of matter. (KILOGRAM)
   
3. 
   TIME: Measurement from end to end of a happening. (SECOND)
   
4. 
   TEMPERATURE: Measurement of hotness. (DEGREE CELSIUS)
   

Some units are derived. They are derived by using the basic units. Below, some of the derived units are explained.

1. 
   AREA: Measurement of the surface. (SQUARE METRE)
   
2. 
   VOLUME: Measurement of the amount of space. (CUBIC METRE)
   
3. 
   SPEED: Measurement of the rapidity of movement. (METRE/SECOND)
   
4. 
   WEIGHT: Measurement of the pull of earth on an object. (NEWTON)
   

EX. 1: Put in the unit. Choose the best answer.

1. 
   The length of this table is 2 …
   
   1. 
      Metre b. Metres c. Kilograms
      
2. 
   This box has a mass of 1 …
   
   1. 
      Kilogram b. kilograms c. seconds
      
3. 
   The area of the room is 6 …
   
   1. 
      Square metre b. Square metres c. Squares metre
      
4. 
   The volume of this room is 12 …
   
   1. 
      Cubic metre b. Cubic metres c. Cubics metre
      
5. 
   The car is moving at a speed of 5 …
   
   1. 
      Metres/second b. Metre/seconds c. Metres/seconds
      
6. 
   His mass is 60 …
   
   1. 
      Kilogram b. Newtons c. Kilograms
      
7. 
   The weight of this box is 1 …
   
   1. 
      Kilogram b. Newton c. Kilograms
      

Ex. 2: Let’s do an experiment.

1. 
   Take three large pots.
   
2. 
   Fill one with cold water, one with luke-warm water and one with hot water. (Not too hot. You should be able to put your hand in it.)
   
3. 
   Take a watch put your right hand in cold water and left hand in hot water. Wait for a minute.
   
4. 
   Now put both hands in luke-warm water. What do you feel in each hand. Write down conclusion. Can you depend on your senses, in making a measurement?
   

ADJECTIVES



Do the exercise:

Homework: Make up sentences using adjectives