In this experiment it includes testing water, using Silver Nitrate, waying out salt, and using lamps. When Starting before pouring your water test the water with silver nitrate to make sure it has not been contaminated. Introduction Evaporation happens when a heat source beats down on water and turns the water into water vapor. The water rises up and goes into the clouds and then comes out when it rains. Then the cycle starts over again. Water evaporates when liquid turns into a gas for heat or other purposes. Silver nitrate is the chemical compound with the chemical formula agNO3. Silver nitrate was sometimes used in hospitals to prevent blindness in babies. Silver nitrate can also be used to detect any salt in water. Materials and Methods
I personally did the nitrate test, but there were many more tests that our group did that day. There is the nitrate test, the phosphate test, the alkalinity ppm test, the ph paper test, and our leader collected rocks to test if they can neutralize acids because that means it can resist acidity. Nitrates and phosphates are polyatomic ions that when they go into streams, they will cause overpopulation of algae and mess up the ecosystem. Dissolved oxygen is good and bad for the creek, if there is too much will kill the macroinvertebrates and too little will to. Acid rain is really bad in our area and because of that we had to test the pH of the creek. pH goes on a scale of 0-14, 0 is a very acidic reading and 14 is a very alkaline reading. Things that have a lot of alkalinity will neutralize the acid make it go to 7, which is the default reading and the reading for average water. A lot of our readings are measured in ppm, or parts per
My first experiment was on a critter count. The critter count involved us to take rocks out of the creek and count all the critters that are on the rocks we find. If we find a lot of group 1 critters, critters that can’t be by pollution, then the waters aren’t polluted. If we find a lot of group 3 critters, critters that can be by pollution, then the waters are polluted. Group 2 critters are critters that can be in both, but not a lot of pollution. My group and I found lots of group 1 critters(63) which was a good sign. We also found 26 group 2 critters, so the water was polluted, but not by a lot. We found 13 group 3 critters, so we know now that the water is slightly polluted, but it is still clean.
There are numerous stages that take place simultaneously in the hydrologic cycle and this includes evaporation. This is when the water alters from a liquid state into a gas. The damp air from the water rises into the atmosphere and when it cools, the vapor condenses and shapes into clouds. But those billows are not the only form the vapors make; it can also materialize as dew, fog and mist, which blanket the Earth, characteristically on a rainy or humid day. Evaporation takes place when water changes from a liquid state into a gaseous state, and ascents out of the pores of the earth and into the atmosphere as a vapor (“How”). While evaporation is taking place, condensation is also occurring. When the temperature in the air plunges, the clouds become heavy and as a result they relieve themselves of the extra weight, which is called precipitation. This produces rain, hail, snow and sleet, conditioned upon the temperate. As the precipitation falls, it enters the surface of the ground and percolates into the soil, which is called infiltration. The more porous the land is, the more the infiltration can take place. However, the ground cannot hold all of that water and floods. The excess rainfall, which is also called runoff that has not been absorbed makes its way into bodies of water, such as small ponds, rivers, lakes and parts of the ocean (“Summary”).
In this experiment, there was a variety of materials used. The materials needed for this experiment are:
The best ratio for potassium nitrate to powdered sugar is 1 to 3 because Grant Thompson who has experimented with the best ratio of powdered sugar to potassium nitrate has stated that “the 1 to 3 ratio is best for creating the most amount of thrust from your rocket.” This paired with a rounded fin design will get the most distance from our rocket. The rounded fin design will block less air and stabilize the rocket.
Ammonium nitrate is a chemical that I first encountered in the chemistry laboratory back in high school. The physical state of ammonium nitrate is typically a white solid, and it soluble in water. The solid can either have a crystalline form or bead form.
In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.
How do liquids evaporate in different conditions? Well, water can evaporate in any conditions, but evaporation works best in warm conditions. I got this information from: www.chem4kids.com/files/matter_evap.html . How does the world use evaporation? The world uses evaporation for the water cycle. The water cycle helps us in many ways. It helps filter our water, but if the atmosphere is very polluted you could get something called acid rain, and acid rain isn’t a good thing for anything to digest or even touch.
In this report, two unknown metals are given and using the materials required for this experiment, the unknown metals must be identified. The two metals are labeled as unknown metal A and B. The procedure informed the audience that one metal is Tin and the other is Aluminium. Knowing the physical properties of a metal, it came to a hypothesis that unknown metal A was Tin and unknown metal B was Aluminium. The reason to the hypothesis is unknown metal B had a shiny luster to it and had the same color as aluminum foil used for food. Therefore, unknown metal B is aluminum making unknown metal A tin.
The purpose of this experiment was to figure out what types of water would have an effect and what that effect would be on seed germination.
The rate of evaporation can increase if the gas pressure decreases around the liquid. Heat energy is used to break the bonds that hold water molecules together, that is why water easily evaporates at the boiling point but evaporates much slower at the freezing point. Net evaporation happens when the rate of evaporation surpasses the amount of condensation. Saturation occurs when these two process rates are equivalent when the humidity of the air is at one-hundred percent. On average, a fraction of the atoms in a glass of water has enough heat energy to escape from the liquid. Evaporation from the ocean is the primary device for supporting the surface-to-atmosphere part of the water cycle. Evaporation is the pathway where water moves from the liquid state back into the water cycle as atmospheric vapor. Studies have shown that the major bodies of water are nearly ninety percent of the moisture in the atmosphere from the evaporation of the water, the ten percent left is contributed from plant transpiration. Evaporation can only occur when water is available. It also requires the humidity of the surrounding atmosphere to be less than the evaporating surface. At one-hundred percent relative humidity, there is no more evaporation. The wind chill effect is one of the
Rate increase when temperatures are higher; an increase of 10C will approximately double the rate of evaporation. The humidity of the surrounding air will also influence evaporation. Drier air has a greater “thirst” for water vapour than humid, moist air. It follows, therefore, that the presence of wind will also increase evaporation. On still days, water evaporating to the air remains close to its source, increasing the local humidity. As the moisture content of the air increases, evaporation will diminish. If, however, a steady flow of air exists to remove the newly formed vapour, the air surrounding the water source will remain dry, “thirsty” for the future
Most water vapor gets into the atmosphere by a process called evaporation. This process turns the water that is at the top of the ocean, rivers, and lakes into water vapor in the atmosphere using energy from the Sun. Water vapor can also form from snow and ice through the process of sublimation and can evaporate from plants by a process
¨Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor. A very small amount of water vapor enters the atmosphere through sublimation. Sublimation is the process by which water changes from a solid to a gas, bypassing the liquid phase. The process of evaporation removes heat from the environment, which is why water evaporating from your skin cools you¨. Evaporation is all about the energy in single molecules, not about the average energy of a system. The average energy can be low and the evaporation still continues. All liquids can evaporate at room temperature and normal air pressure. Evaporation is one of the two forms of vaporization. It is the process whereby atoms or molecules in a liquid state (or solid state if the substance sublimes) gain sufficient energy to enter the gaseous state. It is the opposite process of condensation. Therefore evaporation proceeds more quickly at elevated temperature, at higher flow rates between the gaseous and liquid phase and in liquids with lower surface tension. All liquids evaporate when some of their molecules/atoms fly off the surface into the nearby
2) A several drops of bromine water was added from a dropper bottle to the test tube and the test tube was shaken well.