Post on 12-Apr-2017
transcript
Researching waterTask ? in Erasmus+ - project
In our research we compare four different kinds of
water 1. Tap water
2. Lake water from central Finland
3. River water from capital area4. Sea water from Baltic Sea
In this research you need:
Clear plastic/glass cups
White paper and pen
Indicator paper for pH-tests
1. SmellSmell all of your water samples
How does it smell?
How strong is the smell?
Find out what are the reasons for smell ( eutrophication, salty/no salt etc, concentration of oxygen, soil)
2. Color
Place your water cup above the white paper.
Look at the paper through water.
What is the color of water?
Is the color light or dark?
Find out what are the reasons for different color? (humus)
3. The clarity
Draw a black cross (0,5cm*0,5cm) on white paper.
Place your water cup above the cross.
Clarity of water?
What affects the clarity of water?
4. Acid
Hold indicator paper in water.
Compare the color of your paper to colors in packet.
What are the reasons for different pH?