Period+1+Group+5

Response to Investigation 6 Essential Question(s)**
 * Period 1 Group 5

=We can determine that water vapor is in the air by pulling it back out. In class we did an experiment /lab where we pulled the water vapor back out of the air. We took a cup of colored ice water, covered it with plastic wrap, and left it on our desks. The air surrounding the cup had more heat than the cup. Heat transfer took place and the air around the cup started to give it's heat energy to the cup. As the cup gained heat energy, the air lost it. When the air lost it's heat energy, the molecules came closer together and condensed. The water vapor in the air condensed to a point where it turned back into the form of liquid water. The liquid water attached to the side of the cup because it was a cooler surface. We can prove that the water on the outside of the cup was condensation because it was clear compared to the water in the cup, which was colored. Water vapor gets in our air through three processes, evaporation, transpiration, and respiration. We know this because in class we did an demonstration with evaporation. We took water and rubbed it into our hands and blew on it. The liquid water gained heat energy from our hands. When the water gained enough heat energy, it evaporated off our hands and into the surrounding air. We know that water vapor gets into the atmosphere through transpiration with a discussion we had in class with Mrs. Walton. Transpiration is the process in which plants produce water vapor. The water goes through the plant and in expired from the stomata in the leaves. We know that water vapor gets into the atmosphere through respiration because of a class discussion we had with Mrs. Walton. Respiration is the process which all animals exert water vapor. When animals exhale, they exhale the water vapor in their breath. The water vapor is added to the air around them. Humidity is The demonstration in class we Humidity is the amount of water vapor in the air and is measured in percent. I know this from investigation 1 when we had the hygrometer that measured humidity. It was in percent the measurement when we went outside to measure weather factors with tools. Dew point is the temperature at which water vapor changes from a gas to a liquid and when air is saturated, or when the air is full, with water vapor. It is measured in degrees Celsius. I know this because of our Dragon’s Breath article, the observing clouds article, and upper air sounding article. That explains about relative humidity, dew point, etc.The upper-air sounding graph was the way you could measure how much water vapor was in the air, it then showed us the grams of water per kilogram of air. And the article also states exactly what dew point is. Dew point is not the same every where. The dew point can change from day to day depending on how much water vapor is in the air.Clouds form when water vapor in the air attaches onto a condensation nuclei, a surface where water vapor condenses in the atmosphere. Condensation nuclei can be anything from dirt to pollen to dust. Dew is formed in a similar war. Water vapor condenses to a colder surface such as grass. I know this because of our bottle demonstration where we saw it when you added ice.=
 * How can we determine that water vapor is in the air and how does it get there? What is humidity and what is dew point and how are each measured? How do clouds and dew form?**