Methodology
Independent and Dependent Variables
....What
How
Units
Error
|
IndependentMoisture Content
Using the same type and amount of sand we will add 0.5ml of water to each test
ml / milliliters
±0.05
|
DependentTime it takes for the sand to fall out of the test tube
Using a stopwatch, we will start the timer when the glass tube is opened and stop it as soon as the sand comes out and touches the bowl
s / seconds
±0.01
|
Controlled Variables
Variable
Mass of sand
Type of test tube
Type of beaker
Distance between opening of the tube and bowl
|
Method of control
Use 14.31 grams of sand and weigh it on a digital scale for each test. The beaker and the sand together weigh 65 grams
Use the same tube throughout the whole experiment. We will just wash out the test tube to remove any residue
Use the same beaker to measure the amount of sand. The beaker weighs 50.69 grams
We will measure 30 cm between the opening of the test tube to the bottom of the bowl
|
Equiptment
Safety risk assessment
- Keep out all food and drinks when doing your experiment
- Put all breakable / fragile items far away from the edge of the table
- Take precaution when handling any fragile items
- Clean up any spills to avoid accidents
- When putting the test tube on the clamp stand, make sure to tighten
it enough so it wont fall, but not too much otherwise it might break
Method
1. Set up all the equipment as show in the diagram 2. Place the beaker [ 50.69 g ] onto the digital scale and put in the sand until it reaches 65grams in total including the beaker 3. Put the sand in the beaker and place a test tube stopper on the test tube 4. Place the test tube onto the clamp stand upside down making sure the distance between the end of the test tube and the bowl is 30cm 5. Start the timer when you take the test tube stopper off then stop it when it is in contact with the bowl 6. Repeat this adding 0.5ml of water to every 3 trials |