Unit 7. Matter and forces 94,95

 
                               PRESENTATION

  
  

1. What is The Universe made up of ?
     The Universe is made up of 
      -matter, energy and empty space.  

  




 




2. What is Everything around us made up of?
     Everything around us is made up of matter. 
3. Can Matter be created?
    No, Matter can't be created.
4. Can Matter be destroyed?
  No, Matter can't be destroyed.
5. Does Matter change?
    Yes, Matter changes from one state (or form)
                                      to another.
6. How many states of matter are there 
    in the Universe?



     
 

                                                     ACTIVITIES

IDENTIFY THE STATES OF MATTER
IN THE PICTURE OF THE TITANIC. 

The Universe 
is made up of matter. 
In the Titanic picture 
we can see 
the states of matter. 

TITANIC: - solid   =  ship, iceberg
                  - liquid =  ocean
                  - gas     =  water vapour, air

PARACHUTE: -solid = parachute, strings, 
                                       parachutist, clothes
                          -gas = air

-The parachute 

     shows 

 the force of gravity 

 and air friction.
-Air resistance is 
 friction between 
 an object and the air. 

PARACHUTE :

What are the states of matter 

in the following examples?

a bowl of noodle soup : 

liquid and solid

 a gas cilinder: 

solid and gas

 

 frozen lake:                                  

 

SOLID AND LIQUID

SO, 

a)What are the states of matter in 

a bowl of noodle soup?

b)What are the states of matter in 

a gas cylinder?

c)What are the states of matter in 

a frozen lake? 

The mass of an object is the amount of matter in it and

we measure mass in grams and kilograms. 

The volume is the amount of space it occupies. 

                                                  So,
                              a)Which has more mass:
              a kilogram of feathers           or     a kilogram of iron?

                               

  

                                                                                       

                                                     

b)Why do you think 
 a small stone sinks in water while a giant cruise ship floats?

     -The stone has a    higher density 
so it sinks. 

-The air inside the ship gives it a lower     density than the wate  so it floats. 
 If there is a hole in the ship, 
 seawater enters and 
 it now has a higher density than the water
 so, it sinks.

    

c) Is sea water a mixture? What is it made of?

            A mixture of salt and water.  

        Gravity makes it fall and air friction or    
     resistence makes it fall slowly. 

 
        
             





        Parachutes were first made of silk 
                           and then of nylon. 
             





  Today they are made of ripstop nylon 
   because this material is
    strong, elastic,  light, weight, less expensive
    and easy to pack. 
    The materials are man-made. 

                    ripstop nylon      



-strong: fuerte 
-elastic:elástico
-light: ligero
-weight:peso  
-less expensive: menos caro
-easy to pack:fácil de empacar.