Required practical - Thermal insulation (AQA GCSE Physics): Flashcards
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Aim of thermal insulation practical
Aim of thermal insulation practical
Measure how fast hot water cools with different insulation
Two main variables tested in insulation practical
Two main variables tested in insulation practical
Thickness of insulation and type of material
What Method 1 tests
What Method 1 tests
If thicker insulation works better than thin insulation
Key principle in Method 1
Key principle in Method 1
Only change thickness - keep everything else the same
What Method 2 tests
What Method 2 tests
Which types of materials are the best insulators
How often to record temperature in both methods
How often to record temperature in both methods
Every 3 minutes for 20 minutes
Independent variable in this practical
Independent variable in this practical
Thickness or type of material
Dependent variable in this practical
Dependent variable in this practical
Temperature of the water
Control variables examples
Control variables examples
Amount of water, starting temperature, timing
X-axis on results graph
X-axis on results graph
Time
Y-axis on results graph
Y-axis on results graph
Temperature
Effect of thicker insulation on cooling
Effect of thicker insulation on cooling
Slows down cooling more than thin insulation
Effect of materials with lower thermal conductivity
Effect of materials with lower thermal conductivity
Better at stopping heat loss
Why good insulators work well
Why good insulators work well
They have trapped air which doesn't conduct heat well
What better insulators show on graph
What better insulators show on graph
Gentler slopes (slower temperature decrease)