However, it is important for defense attorneys to know, and to inform the jury, that the techniques used to locate and identify fingerprints are far from a perfect science. An understanding of how fingerprints are located and lifted can help attorneys recognize if a flawed analysis was performed by investigators or lab technicians. Further, knowledge of the various fingerprint collection techniques is essential to successful cross-examination of crime scene technicians and fingerprint examiners.
The Scientific Method Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organism requires oxygen to survive, it is a necessary component of water systems such as streams, lakes and rivers in order to support aquatic life.
The dissolved oxygen is measured in units of parts per million ppm. Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally, answer the questions below.
Make an observation — Based on the data in Table 4, discuss what patterns you observe in regards to dissolved oxygen content and fish populations in the body of water? Do background research — Utilizing at least one scholarly source, describe how the dissolved oxygen content in a body of water can effect fish populations.
The dissolved oxygen levels can cause the fish to suffocate and makes them susceptible to diseases. Retrieved November 8, 3. Construct a hypothesis — Based on your observation in question 1 and your background research in question 2, develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water?
Test with an experiment — Describe an experiment that would allow you to test your hypothesis from question 3. This description must provide ample detail to show knowledge of experimental design and should list the independent and dependent variables, as well as your control.
One area would have a high level of dissolved oxygen while the other area would have a low level. These two areas would be watched over a period of time that would allow you to observe the health of the fish in the two areas of water.
This way you could prove whether or not the dissolved oxygen has an effect on the lifespan of the fish. Analyze results — Assume that your experiment produces results identical to those seen in Table 4, what type of graph would be appropriate for displaying the data and why?
Analyze results - Graph the data from Table 4 and describe what your graph looks like you do not have to submit a picture of the actual graph!
I would use a bar graph style. Draw conclusions - Interpret the data from the graph made in Question 7. What conclusions can you make based on the results of this graph? It says interpret the data from the graph made in question 7 but this is question 7.
Draw conclusions — Assuming that your experiment produced results identical to those seen in Table 4, would you reject or accept the hypothesis that you produced in question 3? Explain how you determined this.1 LAB 1 – The Scientific Method.
Objectives. 1. Apply the basic principles of the scientific method. 2. Generate testable hypotheses. 3. Identify the components of an experiment. VWR International, a global laboratory supplier and distributor of chemicals, life science products, consumables, equipment, instruments, furniture, e-commerce and services.
Is your fifth grader baffled by the scientific method steps?
A good way to help him understand is to look at a complete experiment and have him label each part with the correct scientific method step. Choose the correct answer for each question.
Show all questions ? spatula? beaker tongs? crucible tongs. This is a FREE 26 slide PowerPoint presentation on the nature of science and the scientific method.
The slides are colorful and visually appealing. Steps of the scientific method are covered, but more importantly, the lesson provides examples and practice problems illustrating the application of the scientific method. Jun 20, · Fingerprint evidence left behind by a suspect or victim may identify who was at a crime scene and what he or she touched.
However, it is important for defense attorneys to know, and to inform the jury, that the techniques used to locate and identify fingerprints are far from a perfect science.