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Scientific aspects of water

Scientific aspects of water. 3rd project meeting. Poland Raba Wyzna May 2013 ZŠ a MŠ Hranice, Šromotovo , p říspěvková organizace. Tento projekt byl realizován za finanční podpory Evropské unie.

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Scientific aspects of water

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  1. Scientificaspectsofwater

  2. 3rd project meeting Poland Raba Wyzna May 2013 ZŠ a MŠ Hranice, Šromotovo, příspěvková organizace

  3. Tento projekt byl realizován za finanční podpory Evropské unie. • Za obsah publikací (sdělení) odpovídá výlučně autor. Publikace (sdělení) nereprezentují názory Evropské komise a Evropská komise neodpovídá za použití informací, jež jsou jejich obsahem.

  4. Aquatic Animals Czech ponds, lakes and rivers teem withanimals - fish of all kinds, annoying insects, frogs and small snakes. Thisisour typical fish – a carp.

  5. Fish Pike Catfish

  6. Zander Trout

  7. Eel Perch

  8. Sturgeon Carp

  9. Mammals Otter Beaver

  10. Insects Waterbeetle Mosquito

  11. Dragonfly Treader

  12. Toad

  13. Snakes Slow - worm Grass snake

  14. Aquatic plants Marsh marigold Water buttercup grows to 30-50 cm, rarely about 1 meter. Marsh marigold is widespread in Europe (in the south just a little) and grows in large areas of Asia and North America.

  15. Algae Algae are simple photosynthetic organisms traditionally classified as lower plants. In fact algae grouping unrelated groups of organisms, and some of them are close to plants. Algae can be, depending on the type used both as food and fuel or raw material for the production of hydrogen, methane and biofuels.

  16. Waterlily Its leaves spread on the water surface. Most are located in the middle of ponds, streams and stagnant water. Creeping rhizome is firmly anchored in the muddy bottom (in heavy soil and poor in nitrogen).

  17. People and water Thehuman body contains: • 23 % ofcarbon • 2,6 % ofnitrogen • 1,4 % ofcalcium - traceamountof more than 30 otherelements The most importantis oxygen and hydrogen = water.

  18. The water content in the human body by age: • infants 4/5 water • adultsabout 2/3 water • oldpeopleabout half theweight • • The human body contains • 72% water.

  19. Effectsof water: • dilutednutrients and wasteproductsoffission • allowsnutrientabsorption and transport to the placeoftheirfurthertransformation in the body • allowseliminationofunwantedsubstancesfromthe body (urine, sweat) • a person should drink 2-3 liters a dayofwater

  20. Water and physics

  21. Twogroupsofthe VI A class made a researchwiththeirPhysicsteacher, ourheadmaster. Wewouldlike to presenttheirwork and results. Eachgroupperformedmeasurements, wrotethe report, constructedcharts and created a slide show depictingmeasurements.

  22. Check the electrical conductivity of salt water ZŠ a MŠ Hranice, Šromotovo, the Czech Republic

  23. Authors: Karolína Hendrychová-photosMarkéta Vanduchová-presentationKlára Tolášová,Michaela Švábenská,Monika Tomečková -measurement

  24. Tools: theammeter, thevoltmeter, the DC voltage source, theresistor, lightbulbs, switches, wires, water, salt, copperelectrodes, digitalscales, a spoon, a mixer, a bath

  25. Procedure: 1. Assemble the circuit according to the scheme.

  26. Procedure: 2.Measure the voltage on the source and the electrical current passing through the solution.

  27. Procedure: 3. The scales weigh small quantities of salt (about half a teaspoon) and shovel it into the water. Stir again and measure the size of the voltage and current, calculate the electrical resistance. Simultaneously calculate the concentration of salt.

  28. Procedure: 4. Repeat this procedure even 9x.

  29. Diagram

  30. Measuring the density of salt water ZŠ a MŠ Šromotovo, Hranice, the Czech Republic

  31. Task: Determine the density of seawater? Materials: thedigital scales, thegraduated cylinder, salt, a spoon, a mixer

  32. Procedure: 1.Put salt into the water and mix with a mixer.

  33. Procedure: 2. Measure the amount of water

  34. Procedure: 3. Determine the mass of water

  35. Procedure:: 4. Calculate the density of water and write to the log.

  36. Procedure: 5. Hydrometer to measure the density and write to the log

  37. procedure: This process is repeated even 9x, and always stir in a teaspoon of salt. Náš tým

  38. Diagram

  39. Závěr • Conclusion: The difference between the density of seawater determined by calculating a density measured with a hydrometer does not exceed even one case of 1%. We can say that the measurement of both procedures is comparable. The biggest mistake was loaded volume measurement. • The density of salt water varies depending on the salinity linearly. • It is interesting that the average salinity of sea is about 3.6% salinity Dead Sea 33%.

  40. Waterand CHEMISTRY

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