Evaporative Cooling Station #1 Water and Alcohol
The alcohol is more cooler than the water. If alcohol was your sweat, you would be hotter because alcohol evaporates too quickly and does not carry a lot of heat with it as it goes away. In this experiment, we got two cotton balls and dipped each in aclcohol and water. Then we put it on our hand to see which one was cooler.
The alcohol is more cooler than the water. If alcohol was your sweat, you would be hotter because alcohol evaporates too quickly and does not carry a lot of heat with it as it goes away. In this experiment, we got two cotton balls and dipped each in aclcohol and water. Then we put it on our hand to see which one was cooler.
Water Tension/Cohesion- Station #2 Water on Penny
I predicted that 10 water drops would fit on the surface of a penny before it overflowed. I was wrong and way off, the penny held 31 drops of water and the penny was able to hold that much drops because of cohesion and adhesion. Cohesion made the water bundle up together on the surface and adhesion made the water stick to the surface of the penny.
I predicted that 10 water drops would fit on the surface of a penny before it overflowed. I was wrong and way off, the penny held 31 drops of water and the penny was able to hold that much drops because of cohesion and adhesion. Cohesion made the water bundle up together on the surface and adhesion made the water stick to the surface of the penny.
Surface Tension: Station #3- Water on Parafilm
When I put water on the parafilm, the water did not stick to the parafilm. It slid around the parafilm with ease, and the property of cohesion made the water stick together as one big blob.
When I put water on the parafilm, the water did not stick to the parafilm. It slid around the parafilm with ease, and the property of cohesion made the water stick together as one big blob.
Surface Tension Station #4- Paper Clips on the Surface of a Cup of Water
I got 2 paper clips to float before it sunk. When you add a drop of soap water, the paper clips will automatically sink because soap water breaks bonds down, so it easily breaks the hydrogen bonds and the paper clips sink.
I got 2 paper clips to float before it sunk. When you add a drop of soap water, the paper clips will automatically sink because soap water breaks bonds down, so it easily breaks the hydrogen bonds and the paper clips sink.
Adhesion: Station #5- Graduated Cylinder
When you add water to a graduated cylinder, the water line is not straight because of the property of adhesion. Adhesion allows water to stick to walls of the cylinder, which is why it is not a straight line. The property of adhesion is important in living systems because plants would not get water to its branches and leaves without it.
When you add water to a graduated cylinder, the water line is not straight because of the property of adhesion. Adhesion allows water to stick to walls of the cylinder, which is why it is not a straight line. The property of adhesion is important in living systems because plants would not get water to its branches and leaves without it.
Capillary Action- Station #6- Rolled up Paper Towel
Capillary action would be important to plants and trees because plants and trees would not allow water to get to its higher branches and leaves.In the this experiment we rolled up a paper towel and place one end in a beaker full of blue food coloring and the other end is in a separate beaker filled with regular water. Now we wait until all the blue water comes up into the paper towel by capillary action and into the other beaker.
Capillary action would be important to plants and trees because plants and trees would not allow water to get to its higher branches and leaves.In the this experiment we rolled up a paper towel and place one end in a beaker full of blue food coloring and the other end is in a separate beaker filled with regular water. Now we wait until all the blue water comes up into the paper towel by capillary action and into the other beaker.