Sue classified some substances as shown in the table.
Sue's Table:
Good Conductors of Heat Bad Conductors of Heat
Silver Cotton
Copper Wool
Cork Air
Why is Sue's table incorrect?
a) Air is a good conductor of heat.
b) Wool is a good conductor of heat.
c) Cork is a bad conductor of heat.
d) Copper is a bad conductor of heat.
d) Copper is a bad conductor of heat.
The correct answer is b) Wool is a good conductor of heat.
Sue's table is incorrect because wool is actually a bad conductor of heat and should be classified under "Bad Conductors of Heat" instead of "Good Conductors of Heat."
To determine why Sue's table is incorrect, we need to review the properties of the substances mentioned and identify any inaccuracies.
Looking at the substances listed:
1. Silver and Copper are indeed good conductors of heat. This is correct.
2. Cotton and Wool are commonly known as textiles and are generally considered bad conductors of heat, so Sue's classification is accurate here.
3. Cork is often used as an insulating material due to its low thermal conductivity. This makes cork a bad conductor of heat.
By analyzing these classifications, we can conclude that option c) "Cork is a bad conductor of heat" is incorrect. The accurate statement would be that cork is a good conductor of heat.
Therefore, Sue's table is incorrect because Cork being classified as a "Bad Conductor of Heat" is inaccurate; it is a good conductor of heat, not a bad conductor.
Correcting Sue's table:
Good Conductors of Heat: Silver, Copper, Cork
Bad Conductors of Heat: Cotton, Wool