Pourquoi est-ce que L'eau est collante?
Why is water sticky?
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Water is made up of two elements:
hydrogen and oxygen and chemical formula is H2O. It means two hydrogen molecules are bonded with one oxygen molecule. Water has three states, • when liquid it is called water • when gas it is called vapour • when solid it is called ice |
L'eau est composée de deux éléments: l'hydrogène et l'oxygène et la formule chimique est H2O.
Cela signifie que deux molécules d'hydrogène sont liées à une molécule d'oxygène. L'eau a trois états, • quand le liquide s'appelle eau • quand le gaz est appelé vapeur • quand solide il s'appelle glace |
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DEPPER LEARNING:
Drops On A COIN Lab - EXPLAINED! Cohesion: Water molecules are attracted to other water molecules. Water is sticky and clumps together into drops because of its cohesive properties. If you've played with bar magnets you will know that the positive (+) side of one magnet will repel the other positive side, while a negative (-) side of one magnet will attract the positive side of the other magnet. Positive charges attract negative charges. The oxygen end of water has a negative charge and the hydrogen end has a positive charge. The hydrogens of one water molecule are attracted to the oxygen from other water molecules. This attractive force is what gives water its cohesive (sticky) properties. Surface Tension: Surface tension is the name we give to the cohesion of water molecules at the surface of a body of water. The cohesion of water molecules forms a surface "film" or “skin.” Some substances may reduce the cohesive force of water, which will reduce the strength of the surface “skin” of the water. |
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POURQUOI est-ce que l’eau est collante (sticky)?
Why is water sticky?
• Explain to a partner in your own words.
Why is water sticky?
• Explain to a partner in your own words.
USE SEESAW to record your learning:
After completing our "Coin droplets experiments" and reading about water properties,
please complete the following:
1) Build water molecules with your sour patch candy
2) Take a picture of what you have build
3) Explain which colour represents Hydrogen or Oxygen. For example: Blue candy = Hydrogen with a positive charge. Orange Candy = Oxygen with negative charge
4) Explain why water is sticky? (Use the following vocabulary: Cohesion, bonding, surface tension, positive/negative charge)
5) Give a real-world example that demonstrates how water is sticky. (Hint: Surface tension)
After completing our "Coin droplets experiments" and reading about water properties,
please complete the following:
1) Build water molecules with your sour patch candy
2) Take a picture of what you have build
3) Explain which colour represents Hydrogen or Oxygen. For example: Blue candy = Hydrogen with a positive charge. Orange Candy = Oxygen with negative charge
4) Explain why water is sticky? (Use the following vocabulary: Cohesion, bonding, surface tension, positive/negative charge)
5) Give a real-world example that demonstrates how water is sticky. (Hint: Surface tension)
Quick Facts about water from: https://easyscienceforkids.com/water-molecules-video-for-kids/
- About 70% of our body is also made up of water. And at the time of our birth, the figure was 80%.
- Water is a good solvent. It easily dissolves with salt, sugar and other acids. But some other things like fat, oils etc. do not mix with water.
- Pure water does not have any colour, smell or taste as it has a pH around 7.
- In normal conditions, water boils at 100°C and freezes at 0°C.
- Frozen water means ice takes up more space than the liquid form. It is the reason why many water pipes burst in winters.
- At the polar ice caps of the planet mars, water is found in the form of ice.
- The temperature of your surroundings decides the amount of water you require each day.
- Flowing water can generate electricity. This entire process takes place in hydroelectric power stations.
- More than 70% surface of our planet is covered by water with an approximate amount of 325 million cubic miles.
- 8% of the world’s water is in the form of ice and cannot be used.
- A person can live 30 days without food but cannot survive more than 7 days without water.
- More than 90% of world’s fresh water is in Antarctica and cannot be used.