Tuesday, 28 February 2023
Monday, 27 February 2023
The word water in different languages
The word water in different languages:
- Arabic: ماء (maa’)
- Bahasa Indonesian: air (AH-yer)
- Bengali: jal
- Cantonese: seui
- Danish: vand
- Filipino: tubig (too-BEEG)
- French: eau (oh)
- German: Wasser (VAH-ser)
- Hakka: shui
- Hainanese: dui
- Hindi: paani
- Hokkien: zui
- Italian: acqua (AHK-kwah)
- Japanese: 水 (mizu)
- Korean: 물(mool)
- Latin: aqua
- Malay: air (AH-yeh)
- Mandarin: 水 shui
- Romanian: apa
- Russian: воды (vah-DYH)
- Spanish: agua (AH-gwah)
- Swedish: vatten (Vaah-ten)
- Tamil: நீர் (thanni)
- Teochew: jui
- Thai: naam plao
- Vietnamese: nước (neu-uhck)
The legend of the Dalghiu river
The village of Vama Buzăului consists of four smaller villages: Acriş, Buzăiel, Vama and Vama de Sus or Dălghiu. The village of Dălghiu is named from the river on the banks of which the houses line up. The Dălghiu River is one of the largest tributaries of the Buzău River, which it meets shortly after it has collected its spring waters in a single bed.
The legend says that a long, long time ago, in those lands, there lived an old and very poor man, who had no other support, than a son, named Dălghiu, who loved his father more than himself. Also at that time, it is said, that an evil dragon, wanting to enslave the people, stopped the waters in the mountain by using the secret of a spell known only to him. Now the poor man, after having no water to drink, had no more water to quench his thirst.
Today like that, tomorrow like that, the lad seeing that his old father was almost dying from thirst and not wanting to be a slave to the dragon, one day he took digging tools and climbed the mountain. He began to dig confidently that in the end he would succeed in finding a spring of water. The old father, who was waiting at home, worried that the boy was late and thinking that he could help him with something, he also started climbing up the mountain to the place where Dălhiu, the boy, couldn't stop digging.
Eventually he arrived, but old age, weakness and the cluel thirst killed the poor old man, and he gave his soul into the arms of the boy, who had his father's body on his chest, bitterly crying his pain and helplessness in the face of the merciless fate. He cried many days and nights in a row until the suffering overwhelmed him too. Their bodies, the story goes on, were turned into rocks and the boy's tears became a big and strong spring, which never dries up, bringing the much-desired water to the people.
Seeing all this, the ugly dragon's heart burst with anger, and then the mountain waters broke the barriers and began to flow in streams, through the valleys below, joining with the spring of tears, forming a river that carries its rapid waters among the peaks of the mountains, rushing to meet his older brother Buzaul and since then, people have called the river after the name of the boy, who lost his life trying to help his father, Dalghiu.
Thursday, 23 February 2023
Experiment about water movement
Preparatory activities:
Preparation of the necessary materials :
- a sheet of paper
-crayons
-scissors
- a basin of water
- template for the flower
Activities:
A flower is cut out of a sheet of paper.
The eight petals are colored red and green, then bend inward along the dotted lines.
The paper flower is placed on the surface of the water in the basin. Slowly, slowly, the flower opens.
The explanation lies in the penetration of water between the empty spaces found in the paper fibers and swells them. As a result, the folds straighten, making the flower open.
Usually the water moves down, but it can also go up through the empty spaces of the paper.
Subsequent activities:
Free discussions based on the experiment.
Results:
Student were satisfied by the result and the practical implementation of some theoretical information.
Experiment about the force of water
Preparatory activities:
- a basin of water
- a piece of cardboard
-scissors
-liquid soap
Activities:
The students filled a basin with water. From a piece of cardboard, a child cut a triangle, which was placed in a corner of the basin with one of the points pointing towards the center.
A student put a drop of soap on the tip of a finger (this operation was performed near the basin) and then inserted the finger into the water, behind the cardboard triangle.
The surprise consisted in quickly removing the piece of cardboard (the boat) from next to the child's finger, in the opposite direction.
The soap mixing with the water decreases the force of attraction between its molecules, making it possible to remove the dirt (in our case the boat) from the finger with liquid soap.
Subsequent activities:
Free discussions based on the experiment, taking as an example the phenomenon of removing dirt from dishes / laundry, at the moment of introducing the liquid detergent.
Results:
Student were satisfied by the result and the practical implementation of some theoretical information.
Wednesday, 22 February 2023
Experiment with the types of transformation of the matter
Preparatory activities:
Tools and materials used:
- transparent glasses, electric kettle, cold plate
- tap water, snow, ice
Activity:
- Experiment to observe the change in the state of aggregation of water
Subsequent activities:
- Discussion of bodies in the three states of aggregation
- Observation of work tools
- Spotting the differences between the snow, the water in the glass and the steam coming out of the mug of hot water (color, density, volume, temperature)
- Observing transformation phenomena in real time
Results:
- Obtaining water vapor by boiling/evaporation, water droplets from vapor by condensation, turning snow into water by melting, ice from water by solidification-freezing
- Understanding the phenomenon of water movement in nature and its importance for the life cycle on earth.
Rainbow in the plate
Preparatory activities: We had discussions about water, about certain properties of it, about its importance for humans, animals and the whole nature. We also discussed pollution and water pollution control activities.
Activities: To carry out this experiment, we used the following materials: water, colored candies, plates. The students were grouped into 5 teams.
After receiving the materials, they placed the candies in a circle shape in the plates, then put water in the middle of them. Soon, the colors of the candy began to disperse in the water and also fade, forming a beautiful rainbow on the plate.
Subsequent activities: Students filled in sheets with items related to WATER and ENVIRONMENTAL PROTECTION.
Results: The students observed certain properties of water by doing this experiment. They were very amazed when they saw how the colors on the candies dispersed in the water. They really liked that they worked as a team.
Activity about the impact of poluted waters upon birds and aqatic plants
Preparatory activities:
Activity: The students were directed to notice the stones at the bottom of the bowl and count them. The process of water pollution: oil, linseed powder and cocoa powder were introduced into the bowl in turn.
The students were asked to count the stones at the bottom of the bowl again.
Conclusion: the stones are no longer visible because the dirty water does not allow light to pass through.
In the second part of the experiment, the students were asked to put feathers, leaves and the felt strip back into the bowl.
Conclusion: all the elements introduced into the polluted water got dirty and the residues from the water stuck to them. So polluted water is not a favorable environment for birds, fish and aquatic plants.
Subsequent activities:
Watching a film about polluted waters and their impact on living things.
Wednesday, 8 February 2023
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