tortuga

4. VOLUME
MASS
THERMAL
CONDUCTIVITY
SOLUBILITY
HARDNESS
DENSITY

5. MATTER AND ITS PROPERTIES
Matter is everything around us.
Atoms matter is made out of tiny particles called atoms.
Molecules atoms join together to make groups called
molecules.
Properties
odour taste colour

6. PROPERTIES OF MATTER
 VOLUME how much space matter occupies. We
measure volume in ( ml ). 1000 ml = 1 l.
 DENSITY amount of matter in a volume. We measure
density in ( kg / l ). Density = mass / volume.
 MASS amount of matter in an object. We measure
mass in ( g ). 1000 g = 1 kg.
 HARDNESS is the scratch – resistance of a solid.

7.  THERMAL CONDUCTIVITY ability to conduct or
transfer heat.
 CONDUCTORS INSULATORS
Metals Wool
Iron Wood
Copper Paper
 SOLUBILITY ability of a substance to dissolve in
another substance.

14. WHAT TYPES OF MATTER ARE THERE ?
Pure substances consist of only one type of matter
( silver, gold, salt ).
Mixtures is made up of two or more substances.
HOMOGENEOUS cannot see
individual substances ( air, sea water ).
TYPES
HETEROGENEOUS we can see
individual substances ( sand, salad ).

15. METHODS TO SEPARATE SUBSTANCES
FILTRATION using a filter.
EVAPORATION heating.
SIEVING using a sieve.

16. EXAMPLES OF PURE SUBSTANCES

17. HOMOGENEOUS AND HETEROGENEOUS

18. FORCES AND THEIR EFFECTS
A force is a push or pull that acts on an object.
Forces can make things move, stop
speed up, slow down
or change direction.
TWO FORCES
Non – contact forces
Contact forces

19. NON – CONTACT FORCES
 Magnetism is a force of attraction or repulsion
magnetic materials. Examples metals.
Gravity is a force which attracts all objects towards
each other. Planets have a stronger gravitational force.
Examples astronauts float in space because there is no
gravity.

20. CONTACT FORCES
Friction is the force that exists when two objects
rub against each other.
Buoyancy is the ability to objects to float. Examples
ice cube, submerged.