Properties are facts, given as numbers, that describe how a material behaves or performs
Properties are facts that tell you something about a material – like statistics are numbers that tell you something about how footballers behave...
Statistics from the 1997/98 Season:
|
name |
appearence |
goals |
shooting |
dribbling |
tackling |
passing |
|
Owen |
36 |
18 |
61 |
73 |
49 |
77 |
|
Shearer |
17 |
2 |
43 |
68 |
53 |
67 |
|
T. A. Flo |
34 |
11 |
68 |
65 |
49 |
75 |
|
Di Canio |
35 |
12 |
55 |
76 |
38 |
78 |
Do the numbers correspond to your observations? Who does it say is no good at scoring? Who is no good at tackling? Who's the best passer?
What other properties might one have?
Bookings, red cards, missed penalties, cost.
Here is a table of different materials and the 'statistics' or 'properties' that we are interested in
|
Material |
force to break it |
ability to conduct heat |
temperature to melt it |
heaviness |
force to bend/stretch |
|
steel |
500 |
150 |
1900 |
7850 |
21 |
|
glass |
40 |
1 |
1500 |
2560 |
7 |
|
rigid PVC |
55 |
|
56 |
1394 |
|
|
high density polythene |
30 |
|
94 |
945 |
0.5 |
|
elastic band |
|
|
|
|
0.005 |
Do the numbers correspond to your observations? Do the numbers show that metal is strong, elastic is bendy, glass is resistant to temperature? Plastics are light?