Drops On A Penny Lab Report
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The first thing that needed to be done was to clean the penny with water. Then I
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Fill beaker with water Use the disposable pipette to place water in the graduated cylinder until the unidentified object would be completely submerged in water Record what the measurement of water in milliliters before placing the unidentified object into the graduated cylinder Gently place the unidentified object into the graduated cylinder Record the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder Subtract the measurement of water in milliliters before placing the unidentified object into the graduated cylinder from the measurement of the water in milliliters after placing the unidentified object into the graduated cylinder, this is the volume of the unidentified object Record the volume (the answer you got in step 10) of the unidentified object in the data table Weigh the unidentified object on the scale, this is the mass of the unidentified object Record that number in the data table Calculate the density of the object by dividing the mass by the volume and rounding it to the proper significant figure, Record the density of the unidentified object in the data table Repeat the lab 2 more times and with each experiment record the data in the chart under the correct trial number corresponding with the correct
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In performing these sets of experiments, in which we would drop a water/water solution onto the surface of a penny, we were trying to test and experiment the bonding qualities of water when made into a solution compared to when the water is pure. When we dropped pure tap water on to a penny, the water, instead of flowing and spreading out, stayed together in a single drop on the penny. We wanted to see how different substances affected this phenomenon. When we formulated our guiding question we made sure to preserve these intents in the language: how do foreign substances influence the bonding quality and strength (to the top of a zinc penny in specific) of water? Since these experiments were conducted in groups, we set up a few roles to
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In almost every experiment, there’s an independent and dependent variable, a constant, and a control group. The independent variable in this lab was the coins. The dependent variable was the density. The constant was the amount of water. In this lab, there was no control group .
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In conclusion, the dime was able to pull it off and hold more drops than the penny. My hypothesis was incorrect because, I thought the penny would hold more drops than the dime because the penny was bigger and I thought it would absorb more. But the dime held more. Preston and I even ran the tests or investigation three times for each coin. The one question I had was ,what if the penny was stacked 1 time and the dime was stacked one time,would it make a difference ?
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The Honors Earth Science classes went to the Susquehanna River to solve a problem. The problem was not knowing if the is healthy. The classes want to know if the river is healthy, because the students live near the river, and it affects the classes everyday lives. To answer the problem, the classes did a series of tests, and made physical observations at various islands in the river. The students used test kits and other tools to test pH, temperature, phosphate, nitrate, turbidity, and dissolved oxygen.
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The teacher will say, “Please fill out the rest of your thinking log as you do your experiment; it is the same layout as the one we just did. So, you are going to write the independent and dependent variable, the research question, the constants, the data table, and your claim. There is also a spot on the fifth page where you will need to fill out how you did the experiment. The only part you will not fill out is the list of your classmates’ discoveries on the last page, we will fill that out after the Popplet presentations.”
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The article discusses an experiment. Two types of experiments are presented: some are on humans and others on rats. The textbook defines an experiment as a scientific method that is used to determine the effect one variable has on another variable. It is only through an experiment that the researcher can identify the causality. An independent variable (IV) is the variable that has the effect on the other variable in the experiment.
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In this egg drop project, a container was built to house one egg and was then dropped at various heights. The purpose of this lab was to find how impact time affected the force with which an object, the egg container, hits another surface as the momentum moves to zero. Our hypothesis states that if the impact time is stretched longer then the force exerted on the egg would decrease, making the egg less likely to break. The independent variables for the egg drop project was the height at each drop; the dependent variables were impact time and survival of the egg. The controls were mass, design of the container, and the egg.
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During this project, labeled Body Farm, we watched how the decomposition progress affected pigs. We used pigs because there body is very similar to us humans. This project expanded over a period of 15 days, but we only observed 11 days. Before we started this experiment there was 10 different questions/theories that we had to think about and answer. So every day we would go outside and observe the pigs and record what happened over the course of one day.
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In the lab “All That Glitters” the objective that was focused on during the lab was calculating the density, volume and mass of various substances. The method that was used in finding the volume of the samples is called the displacement method. This is a process where the volume of the water in the graduated cylinder is calculated before and after the sample is placed. In this lab, the goal of the experiment was to identify and come to consensus about what the unknown substance might be. For this experiment, the required materials were ten pre and post pennies, unknown sample, graduated cylinder, weigh boat, water, paper towels and a weighing scale.
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The purpose of this lab was to change pennies from copper to silver to gold, like alchemists have attempted to do in history. Through the data and observations gathered throughout this experiment, it can be concluded that the pennies were not changed into a different element. For example, the density of the penny from 2005; which was the penny that was experimented on to see whether or not it could turn into silver; was 4.62 g/cm3 before the experiment and 4.89 g/cm3 by the end of the experiment. If this copper penny really would have turned into silver, then the density of the penny would be 10.49 g/cm3; which is the density of silver; by the end of the experiment. The penny may have turned silver in color, but this was only because it was plated in the zinc that was added to the beaker of water in the experiment.
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VARIABLES: There are independent variables, dependent variables, and controls. the one that is being tested and the one that is the inconsistent variable in the Independent variable like the volume and surface area of the agar cubes. The variable that is kept consistent is the dependent variable such as the percentage of diffusion of pigment in the agar cubes. The constant variable is the features of the experiment that is kept the same throughout the entire experiment such as, the amount of time the agar cubes are left in the beaker and the amount of acid in the beaker.
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Materials 50 students will be used for this experiment. The students will be presented with material a week before the assessment. The students are going to be given a test packet and an immediate feedback scratch off sheet. Students may use anything to scratch of their answer.
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It is extremely important for us to make sure that our test subjects give their full permission and know what they are being used for. Ethics allow things to run smoothly and if we did not rely on them, our procedures would be much more chaotic. In chapter four, I took the time to really identify the differences and similarities between the independent and dependent variable in an experiment. Variables are something that is changing in an experiment and they are usually are a factor or trait that comes in different amounts.
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Step two: Students placed their samples from the lake into four separate pans, which would later be carried to the lab to be analyzed. Step three: Before leaving the field there was about 16 round finfish that was captured and released back into the lake. Step four: In the lab, each student was placed in four different subgroups and given a pan full of samples from the lake. In each subgroup, students
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