Conduct the investigation below (Shoalhaven Water, 2006).
After completing the investigation create a definition of evaporation. You must include examples of how evaporation is all around us, in our everyday lives.
You can take photographs to assist with your results.
Objective:
To conduct an experiment, to understand the process of evaporation.
Equipment:
· Chalk
· 2 Large Bowls (same size)
· 30cm Plastic ruler
· 1L Measuring jug
· 2 x 500ml Measuring cup
· Water
· Salt
· 1 Measuring tape
Method:
1. Find two concrete spots. An area that is sunny and a shady area, these two areas need to be relatively close to each other.
2. Dissolve some salt into the measuring jug of water.
3. Using the 2 x 500ml measuring cup, measure out 30ml of salt water from the 1L measuring jug. Create two puddles, one in the sun and one in the shade.
4. Using the chalk trace around the outside of the puddles (Refer to the picture).
5. Dissolve more salt into the 1L measuring jug. Pour an equal amount of this into the two bowls. Then place one bowl in the sun and the other in the shade. They should be next to the puddle.
6. Measure both puddles using the measuring tape. Try to be as accurate as possible by measuring around the chalk outline.
7. Measure the depth of the water in the two bowls with the plastic ruler.
8. Record your measurements in a table.
9. Return to the area every hours and keep measuring the bowl and puddles. You can keep drawing a line around the puddle, as they get smaller.
Results:
Complete the table below and record your results.
Select an appropriate graph to record your final results and write down what you noticed about the results.
Some questions to consider:
- How long did it take to completely evaporate?
- Did placing the bowl and puddle in a shady and sunny area affect the results?
- Which method of water evaporated the quickest?
Some questions to consider:
- How long did it take to completely evaporate?
- Did placing the bowl and puddle in a shady and sunny area affect the results?
- Which method of water evaporated the quickest?