Physical properties Flashcards
What are the 5 main classes of matter?
Ceramic, metal, glass, plastic, fibres
Characteristics of ceramic
Made from clay, poor conductor of e, can be moulded into shapes, does not corrode, has a high melting point, brittle.
Characteristics of metal
Shiny, good conductor of e, good conductor of h, can be moulded into shapes, malleable
Characteristics of glass
Transparent, poor conductor of e, poor conductor of h, can be moulded into shapes, has a high melting point, fragile
Characteristics of plastic.
Lightweight, doesn’t corrode, can be moulded into shapes, has a low melting point, poor conductor of e, poor conductor of h
Characteristics of fibres
Can be spun into threads and woven into fabrics, able to absorb dyes, poor conductors of e, poor conductors of h
What does electrical conductivity mean?
The measure of how quickly an electric current flows through a material.
What does thermal conductivity mean?
The measure of how quickly energy is transferred through a material.
What does melting point mean?
The temperature at which a solid changes into a liquid.
What does boiling point mean?
The temperature at which a liquid changes into a gas.
What does strength mean?
The ability of a material to withstand a certain force without breaking.
What does hardness mean?
The ability to resist wear and tear, and scratches.
What does flexibility mean?
The ability of a material to be bent w/o breaking and return to its initial shape and size after bending.
What does density mean?
The mass per unit volume of a material.
What is mass?
A measure of the amount of matter in an object.
What is the SI unit of mass?
kg
What is the precision of an electronic balance?
0.1g or 0.01g
What is volume?
The amount of space occupied by an object.
What is the SI unit of volume?
m^3
How do you measure volume of irregular solids?
Using the displacement method.
How do you measure volume of liquids?
Using beakers, measuring cylinders, syringes, volumetric flasks, pipettes and burettes.
What is the precision of a measuring cylinder?
Half the smallest division on the scale.
What is length?
Length is the distance between 2 points.
What is the SI unit for length?
m
