Progress 5

"Which brand of paper towels is more effective in absorbing a liquid"

Independent variable:

• Paper towels - 5 different brands of paper towel to carry out the experiment.

Controlled variable:

• Amount - only one paper towel will be used to absorb the liquid
• Liquid - the liquid will be kept consistent by setting up a perimeter in which the liquid could travel.

Recorded by how long it takes the paper towel to completely absorb the type of liquid.

Background research -

• Weaving patterns on the paper towel and how the weaving pattern helps to absorb the liquid. How each paper towel has a different weaving pattern - factor which controls the absorbing ability of the paper towels
• Paper towels - purpose and how it is effective

Progress 4 - Project decided (=

Research: The time it requires for water to dissolve a certain amount of salt

Independent variable:

• The amount of salt - 5g, 10g, 15g, 20g, 25g

Controlled variables:

• Amount of water (100 mL)
• Environment - shaded area to prevent the sun evaporating the water

To determine when the salt is completely dissolved:

• When the researcher (THATS ME) and another witness (probably my sister) agree that the salt has completely dissolved.

OR

• When there isn't a trace of salt left in the container .. if the other witness is not available to help