Water cycle

How would you move through the earth if you were a drop of water? We are drawing the path that the water makes based on this video.

 

Water
Why are oceans and seas salty?

When rivers go to oceans and seas they pick up salt and other minerals from the rocks. Water from the river is constantly being replenished by fresh water from the rain. That's why it doesn't taste salty. But water in the ocean collects all the salt and minerals from the rivers. When water evaporates, it leaves the salt and other minerals behind.

Water 

Is water blue?

Our eyes perceive water blue but there are some exceptions:

Hillier lake (in Australia) is pink. The pink dye is created by microscopic organism that live underwater.

Tinto river (in Spain) is red. The red dye is due to the iron disolved in the water. Despite the iron, many microorganisms live in there.

Water

Water appears to be blue because this is the color our eyes see, but in fact water has no color. An object has an specific color because it absorbs all the colors of the visible spectrum except the color it appears to be. This means that water reflects blue light and absorbs all the rest.

(This is the visible spectrum of the light)

Water Cycle: How long does it take a drop of water to complete the cycle?

Paula Morillas, from 3B was wondering how long the water cycle takes. She looked up information on the internet and found that depending on where the drop of water goes the water cycle could last up to 3.000 years:

- In the atmosphere: Water is in the atmosphere for around 9 days, when it falls to the ground it could become underground water or it could make a river that goes to the sea or ocean.

- Underground: When the water falls to the earth, it can stay there for a month or two. If the soil absorbs this water it becomes underground water where it can stay for 200 to 300 years. Deep ground water can remain underground for 10.000 years.

- Ocean and sea: If water ends up in the ocean, it could stay there for over 3.000 years!

The water cycle

Last week, students from 6th grade C and D worked together on the "Water Cycle". The class was divided in groups. After a couple of days doing some research on the topic using the school laptops, they came out with great ideas! Most of them decided to create models and posters. Some others decided to make power point presentations. They all presented their creations in front of the class and explained the water cycle. They had a lot of fun and, above it all, they learnt a lot. Good job!

We learned that the Earth's water is always in movement! The water cycle describes the continuous movement of water on, above, and below the surface of the Earth.

In 6th A and B some students made a wheel with the most important words of the water cycle. Other students created a mini water cycle using a bowl, a mug, some plastic wrap and rubber band to show how evaporation, condensation and precipitation occur in a closed system. Finally, some of our pupils who love singing used the music to learn about the hydrological cycle and how it works.

Have a look at the photos! 

SONG 1 PRESS HERE

SONG nº 2 PRESS HERE