The hypothesis for this experiment was, If three different types of waters (saltwater, fresh water, tap water) are tested, then the liquids won’t evaporate at the same rate and tap water will evaporate at the fastest rate because it won’t have any non-volatile substances to hold it back from evaporating.
This hypothesis was supported by the data found because 2 out of the 3 trials done, tap water evaporated the most over the 5 day period. For the first trial, saltwater lost 96 grams, stream water lost 98 grams, and tap water lost 100 grams. For the second trial, saltwater lost 67 grams, stream water lost 70 grams, and tap water lost 69 grams. For the third and final trial, saltwater lost 71 grams, stream water lost 72 grams, and tap water
Hypothesis: The Alka Seltzer will dissolve fastest in hot water and slowest in cold water.
Are these water loss values (in 7c) of any use in predicting how much water Darlene might have lost per day? Justify your answer.
Hypothesis- Water will evaporate the quickest because there isn't heavy sugars in the drinks slowingdown the evaporation process.
help give a better idea of how the rate of osmosis is affected by the
The researcher conducting this experiment is trying to find out which salt- Epsom, table salt, and sea salt- will increase the boiling point of water the most. Sodium chloride is believed to increase the boiling point of water because when salt is suspended into the water, the sodium and chlorine ions leave the “salt crystals” and mix with the water molecules. (“Why does salt… raise boiling point of water?”, 2009).
Peterson, M., (2014, March 20). Drought: Our homes could be recycling gray water right now—why aren't they? Retrieved on March 21, 2014 from http://www.scpr.org/news/2014/03/20/42917/our-homes-could-be-recycling-gray-water-right-now/
Water Potential Investigation Aim: To determine the water potential of potato cells and sweet potato cells during the process of osmosis. (Only water molecules can pass through by the process of osmosis) Osmosis is the movement of water particles from a low region of water concentration to a high region of water concentration through a partially permeable membrane. A partially permeable membrane is known as the barrier which allows certain substances to move across, such as water molecules which move through freely, but prevents the movement of other substances, like sucrose. [physioweb.med.uvm.edu/bodyfluids/osmosis.htm & www.purchon.com/biology/osmosis.htm] The cell wall of a plant cell is made up of insoluble cellulose fibres which are embedded in a matrix of pectin and other materials. The fibres are very strong and often arranged in layers in which they are orientated in different directions.
The purpose of the lab was to show the effect of temperature on the rate of
Water scalds can cause serious injuries at the right temperature. It is very important that consumers are aware on how to check and adjust the water temperature on their water heaters. Tap water scalds can cause major injuries ranging from third-degree burns to death. This article provides valuable information on the severity of water scalds and information on lowering water temperature.
After reviewing both stories, I decided to go with the shorter version of the “So Much Water So Close to Home” story. Although the short and long versions bear some similarities, the differences between them are strong. The long versions gives specific details, which leave no room for thought. While the short passage, the writer lets the readers put their imagination to use, trying to figure out what had, has, and is going to happen in the story. In both versions, the author starts by stating an identical theme, Claire Husband was seating at the table eating. Obviously something is going on between them, because he is eating with aggressiveness, trying to avoid conversation. In cooperation her husband Stuart is very upset stating “Goddam it, why can’t people mind
The last part of experiment 5, was learning about specific gravity and temperature. Specific gravity does not have any units, it is unitless. When measuring for the temperature, we used a thermometer to calculate the Celsius of the water, 10% sodium chloride, and isopropyl alcohol. The specific gravity uses a hydrometer to measure the gravity of the liquids. Using the hydrometer, to figure out the measurements we have to look at it from top to bottom. The water for specific gravity was .998 while the temperature of it was 24
The oil crisis and fossil fuel scare is currently underway; however, there is a bigger threat that has literally everybody at the very least little nervous. The cause for this more dramatic scare is the growing lack of adequate water supply. Only about 3% of the Earth’s water is fresh and potable, the rest is in the oceans and seas in the form of salt water. With the World’s current increasing population, “by 2025, with an ever-greater number of people sharing the earth's finite supplies of water and its per capita use having more than doubled, two-thirds of the world's people will not have enough water for the basics of life” (Barlow, Corpwatch.org). Water consumption is a problem that must not only be addressed in the United States, but everywhere around the Globe as well.
Evaporation is part of our everyday lives. After washing the dishes, after taking a shower, and many more signs of evaporation in our everyday lives, but does every type of liquid evaporate at the same rate? Sometimes liquids may be sitting in one dry place and its molecules might turn into gas molecules, that is the process of evaporation. When energy in certain molecules reaches a specific level, those molecules have a phase change. Evaporation occurs when molecules escape from their liquid and form into vapor. If there was a puddle of water outside, and it was a windy day, the air from the wind can cause an increased rate of evaporation. When a molecule
possible solutions for whether or not you should or should not drink bottled water. It is a proven
Water Pollution is a current issue that has serious consequences; it progresses everyday in our lakes, oceans, rivers and other bodies of water.