Lab 1: Introduction to Science

The protein molecules in many foods provide the amino acid building blocks required by our own cells to produce new proteins. To determine whether a sample contains protein, a reagent called Biuret solution is used. Biuret solution contains copper ions. However, the chemical state of the copper ions in Biuret solution causes them to form a chemical complex with the peptide bonds between amino acids (when present), changing the color of the solution. Biuret solution is normally blue, but changes to pink when short peptides are present and to violet when long polypeptides are present.

6-3: This process is used by cells to manufacture _biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products__

1. Use the graph below to predict what the results will look like if the null hypothesis is

designing an experiment, we have to design an experiment and we need to confirm the

Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.

I will say that as much as the expression “Canary in the coal mine” implies an early warning of danger in mines so does it in water too. In this case the fish directly helps us know the extent to which our ecological sphere is damaged, and helps humans to take the necessary precautions to save the environment.

At the conclusion of the experiment, the two hypotheses were reviewed. Because the water temperature did affect the normal respiration patterns of the goldfish, the null hypothesis was disregarded and the alternative hypothesis was accepted. From the results of this experiment, it was concluded that although other environmental factors could play

(2) Give that a sample of 25 had x = 75, and (x-x)² = 48 the mean and standard

The dissolved oxygen levels are much higher in this experiment than in the previous experiment.

- Having more dissolved oxygen increases the number of fish observed in the body of water.

7. Graph the data from Table 1: Water Quality vs. Fish Population (found at the beginning of this exercise). You may use Excel, then “Insert” the graph, or use another drawing program. You may also draw it neatly by hand and scan your drawing. If you choose this option, you must insert the scanned jpg image here.

As the Dissolved oxygen increases so does the number of fish that are observed, until the ppm gets up to 14 then the

2. For the following set of scores, fill in the cells. The mean is 74.13 and the standard deviation is 9.98.

fresh-tasting fluid could be sucked out not only from the eyes of larger fish but also from their

10. A random sample of 20 items is selected from a population. When computing a confidence interval for the population mean, what number of degrees of freedom should be used to determine the appropriate t-value?