properties and characteristics

Question 1

heat of combustion

Answer 1

the amount of energy that is released as heat when a substance is burned with oxygen

Question 2

toxicity

Answer 2

how something can damage an organism

Question 3

oxidation state

Answer 3

ability to oxidise is what takes place by gaining oxygen,losing hydrogen or losing electrons
rust

Question 4

name the three chemical properties of metals

Answer 4

heat of combustion
toxicity
oxidation state

Question 5

conductivity

Answer 5

how good current is at passing through

Question 6

resistance

Answer 6

how strongly a given material opposes the flow of electrical current

Question 7

magnetism

Answer 7

pull closer or repel other objects

Question 8

name the three electrical properties of metals

Answer 8

conductivity
resistance
magnetism

Question 9

strength

Answer 9

the ability of a material to stand up to the forces being applied to it without it deforming

Question 10

hardness

Answer 10

ability of a material to resist scratching,wear and tear and indentation

Question 11

toughness

Answer 11

ability of a material to absorb energy.does not break or shatter when under sudden shock

Question 12

elasticity

Answer 12

ability of a material to absorb force and flex in different directions,return to its original position

Question 13

plasticity

Answer 13

the ability of a material to undergo irreversible or pernament deformations without breaking or rupturing;opposite of brittleness

Question 14

ductility

Answer 14

ability of a material to change shape by stretching along its length

Question 15

durability

Answer 15

ability to withstand wear,pressure or damage;hardwearing

Question 16

malleability

Answer 16

ability of a material to be reshaped in all directions without cracking

Question 17

name the 8 mechanical properties of metals

Answer 17

strength
hardness
toughness
elasticity
plasticity
ductility
durability
malleability

Question 18

refelctivity

Answer 18

ability of a material to reflect. describes how much light is reflected from the material in relation to an amount of light incident on the material

Question 19

photosensitivity

Answer 19

the amount a material reacts upon recieving photons.

Question 20

name the 2 optical properties of metals

Answer 20

reflectivity

photosensitivity

Question 21

flammability

Answer 21

those that ignite more easily than other materials

Question 22

thermal conductivity

Answer 22

ability of a material to transfer heat.

Question 23

melting point

Answer 23

temperature at which a given material changes from a solid to a liquid

Question 24

name the 3 thermal properties of metals

Answer 24

flammability
thermal conductivity
melting point

Question 25

colour

Answer 25

how colour makes people feel,take colour into account as people are attracted to it

Question 26

texture

Answer 26

contains important visual information about an object,allows us to distinguish between things

Question 27

finish

Answer 27

a treatment on material after it has been processed to improve attractiveness or servcieability

Question 28

name aesthetic and functional surface finishes

Answer 28

aesthetic- satin,matte,glass

functional-paint,varnish,oil

Question 29

name the 4 aesthetic characteristics of metals

Answer 29

colour
texture
finish
surface

Question 30

state the environmental impact of the extraction of raw materials

Answer 30

affects air quality in the surrounding areas because of high levels of dust and gas in the area
creates noise pollution and affects natural habitat of animals
disfigures the landscape

Question 31

state the environmental impact of fossil fuels

Answer 31

refining petroleum creates air pollution
buring gasoline releases CO2
oil spills cause great environmental damage

Question 32

state ways of sustainable development

Answer 32

solar energy
crop rotation
efficient water fixtures
eco-tourism
green space