Matter
Physical changes
Change in shape: Objects are made up of matter
/
Matter can change (Shape)
(Position)
(Texture)
Mass:( DEF) Is the amount of matter in an object.
The size: is not always related To the size of an object.
Is measured in kg or Gr
Volume: (DEF) Is the amount of space that an object occupies.
Is measured in: l, ml, cm3.
,
- Liquids (DEF) Is measured in measuring cylinders.
Solid (def) regular - shaped solid is calculated using mathematical formuls
The volume of solid (def) irregular- shaped solid is calculated
By the water displacement method
Density:( DEF)The concentration of matter in a particular volume
.Density=Mass Divided
Volumen
.Water Density 1f/cm3
Experiment
.Objects of the same can have
Different densities
STAGES OF MATER :
SOLIDS
They have fixed volume and shape
they átomos are very close together and not move.
They can not flow or be compresed.
Liquids:
They have fixed volume and not fixed shape
They atoms are further apart than in solids and can move more frecuently.
They can flow, but can not
Gases:
They do not have fixed volume of shape
Their atoms are further apart than in liquids and can move moré freely
They can flow and be compressed.
When a gas is compressed : The mass is the same but the volume decreases
SPECIAL PROPIERTIS : SOLIDS CAN BE
ELASTIC : It can be streched and it retuns to it retuns to original shape.
Flexible : it can Beni and does not break
Fragile : It can break easily
Strong : It can support a lot of weight and
Force without breaking.
Specifig propierties: (liquids can be
Viscous: it does not flow easily
Volatile: when it evaporates easily)
Experiment
The cannon:
The first stage is put water in the cannon
Then we put in the front part of the cannon a cup
Then we warmed the back part of the cannon
Then the atoms in the water don’t have space and the cup live from the cannon and the atoms
The snow:
To do this experiment we need artificial snow and water
We put the snow in a little plate
Then we put water in the snow
The snow become more bigger
