Bread Mold Experiment By: Stephanie Westover PURPOSE The purpose of this experiment will be to determine how temperature affects the growth of mold on wheat bread. The researchers choose this topic because she thinks it will be beneficial to find a way to keep food from molding. Determining how long bread can be stored before molding can help save money‚ prevent illness and preserve freshness. The question the researcher will attempt to answer is how freezing
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normalities of aging. Age is essentially an empty variable. How can a scientific measurements be applied and be reliable? Both Hertzog (2003) and Little‚ Lindenberger and Nesseleroade (1999) suggest the main complexity of reliable research into psychological change is how the measurements are used and applied. Heynes (1995)‚ Hofer; Sliwinski and Flaherty (2002) also all discussed and compared the psychological methods of measurement that are being used and their effectiveness in assessing psychological
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1. Measurement is the assignment of numbers to characteristics (or attributes) of objects according to a pre-specified set of rules. Describe the object and characteristics of Syafiq’s study. The object of Syafiq’s study was the website for the Standard Asian Merchant Bank. The characteristics of the study are: customer satisfaction‚ content and layout‚ usable features‚ time spent on the site‚ and required knowledge to access products. 2. The measurement of more abstract
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Investigating Biodiversity Introduction: Species rich meadows are the most species rich plant communities on earth. Of the 2200 species of flowering plants found in Sweden‚ one fifth is considered to be threatened. The most common cause of the species lost is that species’ habitat has been affected by humans. However‚ in northern Europe‚ there is another pattern since farmers have used the land for more than a thousand years in a way that contributed to a greater number of species present. In
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Introduction When using instruments in a laboratory setting to carry out measurements‚ it’s crucial to ensure the instruments’ accuracy and reliability. This will ensure that all data collected and measured in the lab are accurate and reliable as well. The process of testing an instrument’s accuracy is known as calibration. The purpose of this lab was to calibrate a variety of equipment frequently utilized in the Exercise Physiology lab and to become familiar with the operation of the calibrated
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Internal Assessment in Science Subjects – Biology (24% of final grade) Design – D Aspect 1 Aspect 2 Aspect 3 Defining the problem and selecting variables Controlling variables Developing a method for collection of data What IB want Formulates a focused problem/research question and identifies the relevant variables. Designs a method for the effective control of the variables. Develops a method that allows for the collection of sufficient relevant data. What you have to do Research question: You
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Alphonse Bertillion developed a method of recording physical features of a person in such a way that the record would be unique to that person. It consisted of taking measurements of various parts of the body‚ such as the head‚ shoulders‚ fingers‚ and skull. This method was referred to as Bertillionage‚ after its creator. Bertillion developed a set of precise measuring instruments to be used with his method. The Bertillionage system became very popular throughout Europe and the United States
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determination of the density of the unknown (j41) and by doing that we had to determine volumes of the unknown liquid (j41) using three different volumetric devices which are graduated cylinder‚ pipette and burette. Then we had to perform three measurement trials on each device. Graduated cylinder: I dried a clean 50.0 ml graduated cylinder and also measured with a balance and I got 66.39g after measuring the empty cylinder I added 15.0ml of the unknown liquid (j41) and measured it and I got 77
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performance against established standards‚ and taking corrective action. Step 1: Establish Performance Standards. Taj ’s Standards are created when objectives are set during the planning process. Its standard is a guideline established as the basis for measurement. It is a precise‚ explicit statement of expected results from a product‚ service‚ machine‚ individual‚ or organizational unit. It is usually expressed numerically and is set for quality‚ quantity‚ and time. Tolerance is permissible deviation from
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size/diameter of tube / size of bubble / distance the bubble rises angled tile – angle of tile/slide / number of drops / tile surface etc correct answer based on the method used 1 mark 1 mark 1 mark 1 mark Affects the timing measurement Explanation of how it affects the timing measurement eg the larger the hole the shorter the time it takes to empty the cup 3 Suggestion Explanation eg Uses pipette / burette / syringe (to measure volume) Measures out / delivers volume of oil more precisely or Smaller
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