Lab Report Sheet: Lab Experiment

When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change

In the scientific method lab, I explored the different food options for mice in order to find the best one that will help them gain weight. To succeed in this lab, I needed to examine several types of foods including fruits, raw meat, cooked and uncooked foods. In this experiment I used cooked macaroni as a positive control and for the negative control I didn’t feed the mice any food, only water. The main objective of this study was to determine the best solution that will help me understand the metabolism of mice. All mice used in this study were given the same resources, but the only difference was the different types of foods fed to the mice to understand the changes of weight gain or loss between the mice.

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.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

C. An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide.

The purpose of this lab is to explore how density can be used to measure sugar content and percent sugar of beverages not only in the lab, but in the “real world.” Using the standard curve of the percent sugar and density of the solutions in the lab, the percent sugar of regular Coke was determined. The standard curve represented the general trend in the correlation of the values calculated in the lab. Using the data from the experiment, the actual amount of sugar in the soda could be calculated by using the percent sugar found by using the standard curve. (If the soda has a mass of x and the percent sugar is the value y, x ● y = mass of sugar.)

Introduction: Regarding the objective of this lab, five unknown sugar solutions and two beverages were given in order to find the sugar concentrations of each. Concentration is the abundance of a constituent divided by the total volume of a mixture, overall showing how much solute is in a solution. In order to find the concentrations, both substances needed to be weighed and measured and finally have their data plugged into the appropriate formulas for molarity (mol solute/L solution) and density (m/v). To find the relationship between the density and concentration, a calibration curve was used. A calibration curve is a graph with a best fit line, revealing the connection between the two factors. Therefore,

Prior to doing the lab investigation, the students will sketch graphs predicting what the force and spring stretch relationship will look like. Their graphs will demonstrate that the students that their data will need to support or reject their initial predictions; more importantly, the students will get an idea of what data to gather to support or to change their predictions. Once the students have finished plotting their data, they will share their findings with the class by explaining the relationship that their data indicates. To ensure that all students understand the importance of the learning targets, they will explain to one another why it is important to become skilled in data collection and in data analysis; they will also get to

MEASUREMENTS IN SCIENCE Introduction: In this lab, a sample of metal and a sample of plastic were identified using their respective densities. Different materials have a unique density which is defined to be the amount of mass inside a specific volume of the material. The density does not change with the size or shape of the object, so it can be determined using any size sample of the material by dividing its mass by its volume.

2. Explanation of Forces The capsule and Egg have slightly different forces acting on them during this experiment. The egg is within the capsule both during free fall and at impact. Since it is sitting on a surface within the capsule there is always normal force acting opposite to the gravitational force, which is also present and pointing down to Earth.

The following lab report will determine if the mass of the unknown object be predicted based on the analysis of previous data. The purpose of this lab experiment is to find the mass of an unknown object. The way this experiment will be accomplished is through a use of the line regression method. This lab will begin with eight objects whose mass is known to see if there is a perfect fit relation between the mass of the objects to the period that is being tested. This lab consists of the use of five materials that included a standard masses, a stopwatch, tape, a C-clamp, and an internal balance. The procedure was simple, measure the time it took eight masses to get to ten periods cycles within the internal balance and record the results. One

Participants watched two disks moving towards each other from opposite directions. When the two disks meet, a clicking sound is heard occasionally. Participants had to determine whether the two disks bounced off one another or they moved past one another. Sound hints that the disks collided with one another. Participants were asked to answer Physics questions related to motion, before being asked to rate his/her familiarity with sports that involve balls. Participants had to calculate the stream/bounce score which is the number of times the spheres collided with one another minus the number of times the collision did not occur. It was a correlational study and correlation coefficients were calculated before being squared to find

Use results above for equation of motion in y direction: y − direction : ⇒ For object B: 0 = TR − WB = 0 ⇒ WB = TR = T = 17.4 N 0 = 2T sin (35◦ ) − WA WA T = = 17.4 N 2 sin (35◦ )

For the growth of all plants, specific levels of pH in the soil and in the plants themselves are important. These levels of pH affect the growth of the plants. This experiment explores and investigates how different pH environments affect the growth of Mung Beans. This following experiment will also explore the damaging effects of salinity (salt) on seed germination.

The overall purpose of the lab is to have the students practice designing an experiment, gathering data, and then analyzing that data to form a conclusion using the scientific method. It also served to understand key terms such as hypothesis, dependent variable, and independent variable. The specific objective of this lab is to determine whether certain human body parts experience allometric or isometric growth. Allometric growth defines when certain parts of an organism grow at unequal rates in comparison to its whole, while isometric growth is when all parts of an organism grow at the same rate in comparison to the entire organism. The specific purpose of the lab is to determine whether or not specific human body parts experience allometric or isometric growth by comparing the ratios of height to two specific body parts, in the students’ case the right hand length and head circumference, in students and newborns. The students formulated the tentative answer that if a team of four compared their height to right hand length ratio, as well as, their height to head circumference ratio, to those of a newborn’s, then the students will discover that the right hand and head experience allometric growth in humans.