PART 2 | Planning and collecting primary data
Loft Insulation Experiment
Hypothesis
The thicker the insulation the less the heat is lost.
Variables
Independent variable
I am going to change the amount of layers of insulation and the material of the layers.
Dependent variable
I am going to observe the change in temperature when the container is covered with one layer, 2 layers and 3 layers.
Controlled variable
I am going to keep the amount of water and container the same. I am also going to make sure each layer of materials gets the same amount of time.
Things Needed
Material
Its Use
Risk
Hot water(100ml)
To be able to measure the rate of heat of the water with the thermometer.
You might end up spilling the water and burning yourself.
Measuring cylinder
To measure the volume of water.
Easily breakable.
Thermometer
To measure the temperature of the water.
The glass thermometer might fall and break so clean it up quick or more risks can happen.
Stopwatch
To insure that each layers of materials have the same amount of time to reduce the rate of heat
The timer might also fall and break which means it would not work properly.
4 Metal Containers
To hold the water.
The metal container is malleable so it might fall and someone could step on it and sharp edges.
Layers of Insulation
To reduce the rate of heat or in other word keeping the water warm.
You could tear it easily so don’t stretch it.
Lid
To make sure no heat escapes from the container.
Might break and sharp edges.
Method
1. First warm up the water in the kettle. Then you get the four containers; wrap each container with a different material (only one layer).
2. Measure the boiled water in the measuring cylinder (only 100ml). After you have measured put 100ml in each container.
3. Measure the temperature of each container (each should be the same but measure them anyway). Write down the material and the starting