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Holy Trinity CE Primary School

Holy Trinity CE Primary School

Learning and caring together, building a firm foundation for the future

Where Does Water Go?

Year 4 have been very busy this week, investigating where does water go? The year group were given this question, a list of equipment and invited to design and carry out an investigation to solve it. We used: flannels, water, data loggers and measuring equipment to carry out our experiments. Before we began, we made sure our tests were going to be fair, and decided our three locations to put our water soaked flannels. After an agreed amount of time we collected the information we needed, using our data loggers to collect the lux, decibels and temperature of the locations. We also weighed the flannels.

What did year 4 think of their investigation?

Shanna and Maddie: we had to be extra careful when weighing the flannels to make sure we weighed them correctly. We had to use our maths skills to add up the weights on the blanace scales.

Nelly and Gurivir: The data loggers were easy to use, they told us the temperature in degrees and the light in lux.

Have a look at Daniel's method he created to explain how he carried out his experiment and his results table.

  1. Collect equipment.
  2. Weigh dry flannel.
  3. Measure out 150ml of water in the water cylinder.
  4. Collect temperature, lux and decibel readings using the data logger.
  5. Pour the 150ml of water in a tray and soak the flannel for 15 seconds in the water.
  6. Wring the flannel for 5 seconds.
  7. Weigh the flannels again
  8.   Place your flannels in your chosen location.
  9. Leave the flannel for your agreed time(one hour) and return to take sound, weight, temperature and light
  10. Return and repeat three times.


Flannel  1





40g dry

916 lux



135g wet


125g wet

1.10 lux





115g wet

1.55 lux





103g wet

1.38 lux






Flannel 2





50g dry

300 lux



136g wet

110g wet

200 lux



97g wet

28500 lux




84.9g damp

1.65 lux



Flannel 3








40g dry

23000 lux



139g wet




100g damp

48000 lux









38500 lux

77g dry





50g dry

72000 lux









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