This is Station 6, where my team saw the capillary action of water in action! You can see that the blue water is traveling up through the porous paper tissue using both its cohesion and adhesion properties to move through the paper against the force of gravity.
This is Station 1, where we tested the heat absorption property of water. first, we put 1 drop of alcohol on the back of our hands, then a drop of water. We then felt that the alcohol was colder. The reason for this is that unlike alcohol, water can absorb heat from your body rapidly, so it felt warmer.
This is why sweating cools you down, your sweat takes heat away from your body by absorbing your body heat, then evaporating it away.
This is why sweating cools you down, your sweat takes heat away from your body by absorbing your body heat, then evaporating it away.
This is Station 5, where we saw adhesion at work. When water is poured into a graduated cylinder, it creates a curved surface where the water is sticking to the sides of the glass. This curvature is called meniscus. when measuring the level of the water, you have to measure the lowest point or middle of the meniscus.
At Station 4, we demonstrated how the salinity of water effects its density
This is a picture of my team dyeing the Saltwater blue. We tried to combine this salty water to less dense, freshwater, but they ended up mixing, because we poured the water in too fast. In other tests, the salty water sank below the existing fresh water, forming a layer beneath it. This is because the saltier the water, the denser it will be.
This is a picture of my team dyeing the Saltwater blue. We tried to combine this salty water to less dense, freshwater, but they ended up mixing, because we poured the water in too fast. In other tests, the salty water sank below the existing fresh water, forming a layer beneath it. This is because the saltier the water, the denser it will be.
At Station 2, we used a pipette to see how much water we could drop onto a normal penny. We noticed the bubble that formed on top of the penny, formed by surface tension. This is caused by cohesion on the water's surface, causing the water to keep from spilling over the top after it overflowed.
At station 3, we looked at what would happen when we put paperclips on the surface of water. Most of them sunk, but some of them stayed on the surface because the surface tension held them up. When we put the dish soap in, the paperclips sunk to the bottom. This is because the dish soap disrupted the hydrogen bonds of the water.
Also at Station 2 We also looked at what would happen to different liquids, one of which was water, when we put drops of them on wax paper. The water formed into a bead, while the other liquids spread out. The water did this because the cohesion, or attraction between the water molecules caused by polarity, made it stick together in the most efficient shape, a sphere, when it landed on the paper.