Year 5 have been learning about condensation and evaporation during recent science lessons. We have introduced the two concepts to the pupils and looked at how although they both explain two very different scientific processes, there is also some similarity in both terms.
Three separate experiments have been set up by Year 5 to help us to understand how different factors might speed up the process of evaporation. The pupils have been interested in looking at the variables of heat, wind and surface area.
To find out if heat plays a role in helping to speed up evaporation we placed two containers of the same size and containing the same amount of water in two places where the heat is the variable. One went in the fridge, the other in an oven for a short time. We took both containers out of each setting at the exact same time and then measured the level of water remaining. We were able to conclude that a higher temperature can speed up the evaporation process as less water remained in this container.
A second experiment made use of the role of wind in helping to speed up evaporation. Once again we measured the same amount of water into the same sized jug, and then placed these in different locations. One went outside, one in the classroom and a third was placed directly in front of a fan. We found that the water evaporated quicker when placed in front of a fan, leading us to conclude that wind is a variable to speed up evaporation.
Our final variable was that of surface area. For this experiment we kept the amount of water level as a constant, but the size of the vessel in which it was placed was changed. We used narrow test tube, a medium sized container and then a tray with a large surface space. Each container was placed in the same place in the school for the same amount of time.
Want to find out what happened next? You can learn a little more in the video above…