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# Water_M. Tkacovs

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### Water_M. Tkacovs

1. 1. Riga Ostvalda Secondary School Form 1c Maksims Tkačovs
2. 2. Hello everybody. My name is Max. In this Project I will :  tell you interesting facts about the water  show you some experiments with water made by me and my parents at home
3. 3. Facts about Water  The existence of water is essential for life on Earth  Water covers around 70% of the Earth’s surface  Pure water has no smell and no taste  Water has three different states, liquid, solid and gas  The word water usually refers to water in its liquid state. The solid state of water is known as ice while the gas state of water is known as steam or water vapor  The longest river in the world is the Nile River, it reaches 6650 kilometers in length
4. 4. Experiment # 1. Where does the water go when a plant is watered? Water is part of all plants And you can see the movement of water through the roots to the shoots
5. 5. Experiment # 2. Do hot water and cold water mix? Step 1  Some liquids float on top of other liquids. Oil floats on water. Alcohol floats on oil. That's because these liquids have different densities. Whenever you put together two liquids that don't mix, the liquid that is less dense will float on top of the denser liquid. A drop of oil weighs less than a drop of water the same size. The oil is less dense than the water, so it rises to the top.
6. 6. Experiment # 2. Do hot water and cold water mix? Step 2  Let’s fill four identical jars with food colouring liquid. I was using red and green colours for this experiment.
7. 7. Experiment # 2. Do hot water and cold water mix? Step 3 Green colour for cold water and red colour for hot water
8. 8. Experiment # 2. Do hot water and cold water mix? Step 4  Put the upside-down green jar right on top of the red jar and red jar right on top green jar.
9. 9. Experiment # 2. Do hot water and cold water mix? Step 5  Hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water. When the cold water is on the bottom, the hot water doesn't have to rise: it's already on top. The cold green water stays on the bottom and the hot red water stays on top.
10. 10. Experiment # 3. The Raisin Dance.  The raisins in this experiment sink quickly when the density is greater than the density of the water. The CO2 gas bubbles attach themselves to the raisins, which help make them less dense than water. The raisins are able to float at the surface carried by the carbon dioxide bubbles. After a few seconds, the bubbles break, and the raisins fall back to the bottom. The process repeats itself over and over. These carbon dioxide bubbles are like the water wings you or your little brother or sister wears when you need help swimming. They help you float, just like the carbon dioxide bubbles help the raisins to float. When the bubbles burst at the top, it's like the raisins took off their wings and sunk back down to the bottom.
11. 11. THANK YOU FOR YOUR ATTENTION!