This task is about the relationship between surface area and evaporation.
Task: To show that surface area influences the rate of evaporation
 Trace around the top of these three containers; petri dish, measuring cylinder, 100 mL beaker, on a piece of graph paper.
 Calculate the surface area of each container by counting the squares on the graph paper.
 Pour 25 mL of water into each container.
 Leave the 3 containers in the same place for 3 days.
 Measure the volume of water left.
a) 
Complete the results chart.


b)

i)

Which container lost the most water over the 3 days? ____________________


ii) 
Why did this container lose more water?


iii) 
Explain what happens when water evaporates.


c) 
How could the rate of water loss in this experiment be increased?
