I. Introduction The purpose of this experiment is to determine the pH values of acids‚ bases‚ and buffers of distilled water and 10.0 buffer using measured concentrations of Sodium hydroxide (NaOH) and/or Hydrochloric acid (HCl). Acid is a compound typically having a bitter taste and capable of nullifying alkalis and releases hydrogen ion when added to a solution‚ or containing an atom that can accept a pair of electrons from a base (McKinley‚ Dean O’Loughlin‚ & Stouter Bidle‚ 2016). Bases are water-soluble
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002141-0012 Nuba Jackson IB Biology Microbiology IA How effective is Lysol in the reduction of bacterial growth compared to Pinesol in reduction of E. Coli growth in agar at room temperature? Background Information: Pinesol and Lysol are both common household disinfectants that make very big commercial claims; both claim to kill 99.9 percent of bacteria. Lysol contains
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Some students measured the pH of water containing elodea‚ a common water plant. The students wanted to learn how much carbon dioxide elodea removes from the water. The students knew that decreasing levels of carbon dioxide correspond to increasing pH. Which cellular structure in elodea carries out the process that is most likely to result in increasing pH? Which structures‚ if found in a cell‚ would provide the best evidence that the cell is eukaryotic? Where in the cell do the following
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IB PAPER 2 ESSAY RUBRIC |1-3 |4-5 |6-7 |8-9 |10-12 |13-15 |16-20 | | Understands the question |Almost no understanding of the question |Little understanding of the question. Question is not addressed effectively |Some indication that question is understood. Question partially addressed. |Demands of question are generally understood and addressed |Demands of question are understood & addressed‚ though not all implications are considered |Demands of question are effectively & relevantly addressed
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courses. According to the College Board’s website‚ AP Biology courses are designed to be the equivalent of a college introductory course‚ usually taken during a biology major’s first year of college. Students who choose to take AP Biology may be allowed to skip over introductory biology courses and enroll in courses in which biology is a prerequisite. Because universities grant college credit for this course‚ they require that the textbooks‚ labs‚ and coursework used by AP courses be equivalent to
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| | | |4 | | |Nature of the Extended Essay | | | |5 | | |The Extended Essay and the IB Learner Profile | | | |6 | | |Relationship to Theory of Knowledge | | | |6
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Nervous System and Sensory Organs • dorsal roots and ventral roots - connect Spinal nerves to the spinal cord • medulla -responsible for many involuntary functions such as heartbeat and breathing‚ primary communication pathway between the spinal cord and the rest of the brain‚ • cerebellum - receives input from multiple sensory receptor types and uses this information in coordination of complex body movements • pons- communication between lower and higher brain regions • midbrain- processes
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Biology project Measuring Light Intensity Soil moisture and soil pH meters are also available - both are used by simply pushing the probe into the soil and reading themeter. Errors can be made when measuring abiotic factors when the soil moisture or pH meter probes are not cleaned between readings. As always the results can be made more reliable by taking many samples. Here are some examples: Daisies The more light available‚ the more daisy plants will be present.0 This is because daisies
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Early childhood literacy resources (F-2) 2013 Classroom resources Resource title and description Note: To address the range of student needs in their classes teachers draw on content from a number of year levels. This ensures that student learning builds from year to year. Words‚ sounds and letters - Kindergarten This document provides an overview of a suggested sequence for teaching and learning words‚ letters and sounds in kindergarten. It explains what this learning involves‚ why
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Lung cancer kills more people in one year than all criminal and accidental deaths combined. These statistics are shocking‚ but the good news is that people are now well-informed about the risks connected to lung cancer. They know that their risk of contracting this terrible disease decreases if they either stop smoking or do not smoke at all. Unfortunately‚ the same cannot be said about other types of cancer. Many people are not aware that their everyday behavior can lead to the development of these
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