1. SC.8.P.8.4 Properties of Matter
Classify & compare substances on the basis of physical properties that can be measured (density, thermal, electrical conductivity, solubility, magnetic properties, melting & boiling points & know that these properties do not depend on the amount of the substance.

2. Bell ringer
True/false Changing the location of an object affects the objects mass
Why Is it important for scientist to include units of measure when conducting experiments, trials, or studies?
Solve the following:
Calculate the mass of the mystery object:
Density= 25 g
Volume= 30 g

3. Physical Properties observations without changing the identity
Changing the mass or volume does not change the substance
States of matter: GAS, LIQUID or SOLID
Also,
malleability
Electrical conductivity
magnetism
Boiling point
solubility
Density
Shine or luster
Thermal conductivity

4. Chemical Properties
Describes a substances ability to change into another
Can only be observed as the substance changes
Flammability
Reactivity

5. Bell ringer: (write the question)
What is a chemical property? Provide an example
How would you define temperature?
What does the word kinetic mean? (hint: kinetic energy)

6. Physical vs. Chemical
Physical can be observed without changing the identity
Example: Making something colder or hotter
Chemical can ONLY be observed by changing the identity

7. What is the kinetic theory of matter?
All of the particles that make up matter are constantly in motion.

8. How do particles move inside a solid, liquid, and gas?
Particles are close together and do not have much place for movement
Particles vibrate back and forth
Liquids
Particles move much more freely than a solid
Gasses
Particles are furthest apart and can move around at high speeds

9. How do you describe a solid?
A solid has a definite shape and a definite volume.
Two types of solid
Crystalline solid
Amorphous solid

10. Amorphous solids Crystalline solid
Particles are not arranged in a regular pattern
Does not melt at a certain temperature
Ex. Glass, plastic, and rubber
Crystalline solid
Solids that are made up of crystals
When heated can melt
Ex. Salt, sugar, snow

11. What is temperature?
Temperature is the average kinetic energy of all particles in an object
When something is cold, that means the particles are moving very slow
When something is hot the particles are moving very fast

12. How do we measure temperature?
Temperature is measured used an instrument called a thermometer
It can be measured in Celsius,
Fahrenheit, and kelvin

13. What is heat?
Heat is the energy transferred from one object at a higher temperature to an object at a lower temperature.

14. What is thermal energy?
Thermal Energy is the total kinetic energy of all particles in a substance.
Involves the temperature of an object and the size of the object

15. What is a conductor and insulator?
Is a material that is a poor conductor of heat
Ex:
Rubber
Oven mitts
Conductor
a conductor is a material that transfers heat very well
Ex:
Metal

16. Melting point
The specific point melting occurs is known as melting point.
The change in state from solid to liquid is called melting.

17. Boiling point
The change in state from a liquid to a gas is called vaporization.
Vaporization that takes place both below and at the surface of a liquid is called boiling.
The temperature at which liquid boils is called boiling point.

18. Identifying a substance by using chemical & physical properties
Characteristic properties: properties that are unique to a substance
Density (physical)
Flammability (chemical)

19. What is a force? A force is simply a push or pull
A force can cause an object to accelerate
All forces act on objects

20. How can forces act? Forces can act in direct contact or at a distance
Contact forces
When one objects touches another
Forces that act on a distance
Magnetic force
gravity
Forces can transfer energy
Examples:
Friction
Winding a emergency radio

21. How do multiple forces interact?
Net force
The combination of all the forces acting on a object
How do we calculate net force?
When forces act in the same direction, they are simply added together
When forces act in opposite directions, the smaller force is subtracted from the larger force.

22. How do multiple forces interact?
Balanced forces do not change motion
Motion is caused by a unbalanced force
Unbalanced forces combine to produce acceleration