My Investigation of Evaporation

1. My Investigation of Evaporation Discovering more about the science of evaporation By Isobel Blacker

2. Equipment needed: • 4 glasses • 1plastic cup • Water • 2 measuring jugs (half a litre jug and 1 60ml jug) • Marker pen

3. How to carry out an investigation I placed the 4 glasses, together with the plastic cup, in different rooms. These rooms were: • The kitchen • The conservatory • The play room • The lounge • Mum and Dad’s bedroom. Using a plastic cup showed if varying the material affects how much water evaporates. Everyday, I checked the outside temperature to predict if more or less water would evaporate.

4. My Predictions Before I started my experiment, I predicted what could happen. In the kitchen, I predicted that it could evaporate a lot because of the heat coming from the cooker. I thought that, in the conservatory, it would evaporate quite a lot too, as there is plenty ofnatural light from the sun. In the lounge I presumed the water would not evaporate as much as the first two rooms because, for most of the day, the curtains are drawn across. The next room - Mum and Dad’s bedroom - has 2 big windows and I placed my glass right next to one of them, thereforeI anticipated that the water would evaporate a lot. When it came to the play room, I was not sure what would happen, because that was the room where I had placed the plastic cup.

5. Measurements: Day 1- Sunday

6. Measurements: Day 2 - Monday

7. Measurements: Day 3 - Tuesday

8. Measurements: Day 4 - Wednesday

9. Measurements: Day 5 - Thursday

10. Measurements: Day 6 - Friday

11. Measurements: Day 7 - Saturday

12. Measurements: Final Day 8 - Tuesday

13. What would I change? If I carried out this experiment again, the changes I would make are:- • The room where I placed my glasses – by doing this I would be able to tell how much water evaporates, depending upon the temperature and light in the room. • The material of the cup/glass I used – the material can change how much water evaporates even if there is lots of light or heat.

14. What did I learn? During this experiment, I learnt many things I wouldn’t have known if I had not undertaken the experiment. The material of the cup/glass can affect how much water evaporates. When I placed my plastic cup in the play room, I put it on a table where all the light could get to it. Bubbles also appeared, however, only in this cup. The water level remained the same. Evaporation can happen quickly or slowly. Take the conservatory for example. The water started evaporating very slowly, moving only once in the week until I took my final readings. In the end, the glass of water from the conservatory was the glass which had evaporated the most.

15. Were my predictions correct? Most of my predictions were correct or nearly correct. The level of water in the glass in the kitchen went down 24ml from start to finish, proving my predictions, in that case, were correct. In the conservatory, what I predicted was not right at first, as the water evaporated slowly and then got quicker. Soon it was the glass with the least water in it. In total it went down 32ml. When I predicted the lounge water wouldn’t evaporate as well as the others, this was incorrect. The lounge started off being the fastest to evaporate. The glass went down 25ml. In Mum and Dad’s room, I thought the water would evaporate a lot. It turned out that I was right, but the water only evaporated by 23ml. The plastic cup in the play room had the most water in it at the end of the experiment. The water had only gone down by 10ml over the whole 8 days of the investigation.

16. My Photo Diary of Investigation

17. Clockwise: Marker pen, 4 glasses and 1 plastic cup, 2 measuring jugs

18. Me, measuring how much water evaporated from the glasses and how much is left.

19. Glasses used in the experiment

20. All of the glasses used together

21. THANK YOU FOR WATCHING! Now you can do this fun experiment at home too.