This document provides guidance for students on carrying out an in-depth practical chemistry investigation for assessment purposes. It outlines the key components of the investigation including developing an accurate procedure, controlling variables, processing and representing data, writing a justified conclusion, and relating findings to chemistry ideas. The document also provides examples of topics, guidelines for setting up tables and graphs, variables to control in experiments, and pointers to remember for the assessment.
Different Approaches in Estimating Measurement UncertaintyPECB
Measurement uncertainty is the significant part of organizations’ decision making and risk assessment process because all type of organizations base their decisions on reports enclosing measurable data. A measurement result of a laboratory is an estimate of the value of the measure, and quality of this estimate depends on the inevitable uncertainty. Giving quantitative indication of the quality of the measurement result is obligatory so that those who use it can assess its reliability. Without such an indication, measurement results cannot be compared, either among themselves or with reference values given in a specification or standard.
Main points covered:
• Measurement uncertainty vs. measurement error
• Bottom- up approach for estimating uncertainty
• Top- down approach for estimating uncertainty
Presenter:
This webinar was presented by Bahar Hosseinzadeh, PECB Certified Trainer and Sales Manager, ISO/IEC 17025 Consultancy Project Manager at PQP Ltd.
Link of the recorded session published on YouTube: https://youtu.be/kR47GnhNjPw
THIS PPT IS ABOUT MEASUREMENT SYSTEM ANALYSIS.. THIS IS VERY USEFUL FOR PERSON WORKING IN INDUSTRY. IT ALSO TALK ABOUT SIX SIGMA APPROACH FOR EFFECTIVE MEASUREMENT.REPEATIBILITY & REPRODUCIBILITY ARE ALSO WELL EXPLAINED IN THIS PPT.
An illustration on the Measurement System Analysis(MSA) which leads to Excellence in Dimensional integrity. A complete journey through the process and explanations for implementation.
Different Approaches in Estimating Measurement UncertaintyPECB
Measurement uncertainty is the significant part of organizations’ decision making and risk assessment process because all type of organizations base their decisions on reports enclosing measurable data. A measurement result of a laboratory is an estimate of the value of the measure, and quality of this estimate depends on the inevitable uncertainty. Giving quantitative indication of the quality of the measurement result is obligatory so that those who use it can assess its reliability. Without such an indication, measurement results cannot be compared, either among themselves or with reference values given in a specification or standard.
Main points covered:
• Measurement uncertainty vs. measurement error
• Bottom- up approach for estimating uncertainty
• Top- down approach for estimating uncertainty
Presenter:
This webinar was presented by Bahar Hosseinzadeh, PECB Certified Trainer and Sales Manager, ISO/IEC 17025 Consultancy Project Manager at PQP Ltd.
Link of the recorded session published on YouTube: https://youtu.be/kR47GnhNjPw
THIS PPT IS ABOUT MEASUREMENT SYSTEM ANALYSIS.. THIS IS VERY USEFUL FOR PERSON WORKING IN INDUSTRY. IT ALSO TALK ABOUT SIX SIGMA APPROACH FOR EFFECTIVE MEASUREMENT.REPEATIBILITY & REPRODUCIBILITY ARE ALSO WELL EXPLAINED IN THIS PPT.
An illustration on the Measurement System Analysis(MSA) which leads to Excellence in Dimensional integrity. A complete journey through the process and explanations for implementation.
Research ProposalType of StudyResearch Question.docxgholly1
Research Proposal
Type of Study
Research Question
Quantitative
Systematic Observation
Correlation
Qualitative
Naturalistic Observation
Experiment/Quasi
Measuring your outcome variable (Dependent Variable)
Qualitative – Field notes then looking for patterns or categories you can describe.
Use examples to demonstrate those patterns. Going to need multiple opportunities to observe.
Quantitative – How are you going to get numbers (counts or scores)
Number of questions get right
Number of times they do behavior
Length of time they do some behavior
Average value on a series of likert questions
Number rating during an observation
Variables
Each Variable needs both Conceptual and Operational definition
Independent Variable
Conceptual – Describe what it is
Operational – identify the groups
Dependent Variable
Conceptual – Describe what that variable is
Operational – How will you get numbers for it (how will you measure it) Needs to be specific
Coded behaviors (Observation)
Survey questions
Ratings
Tests
Standard measures (ruler, watch)
Format
Rationale
End with Hypothesis or Research Question
Method
Participants – Sample method, issues
Design - Why
Measures – Definitions, examples, validity, reliability
Procedures – Step by step detail
Analysis – how do you propose to analyze data (what statistical test or procedures)
Always keep in mind
External Validity
Internal Validity
Construct Validity
When designing your study.
ChE 201 – ChE Fundamentals
Final Exam Review Problems
1. Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted. The exhaust gas is passed through several air pollution control unit operations before being released through a smokestack into the atmosphere at a temperature of 400 C. Determine the flow rate (in m3/hr) of exhaust gas through the smokestack. {Answer: 79,400 m3/hr}
2. Determine the density of steam at 200 bar and 400 °C.
a) Use the ideal gas law {Answer: 64.3 g/l}
b) Use the compressibility factor. {Answer: 101 g/l}
c) How can you easily verify your number? How well did the models work?
3. Low density polyethylene (LDPE) is produced in a long tubular reactor under harsh conditions (T = 200 C and 1800 bar). Ethylene is pressurized, mixed with catalyst, and pumped into the reactor where (LDPE) is produced. The reactor itself is 0.5 m in diameter and 1800 m in length. Hint: the following equations may help you.
and
Where is the mass flow rate in kg/s, is the volumetric flow rate in m3/s, is the fluid density in kg/m3, u is the average fluid velocity in m/s, and A is the cross sectional area in m2.
a) What phase is the ethylene? How can you tell? {Answer: supercritical}
b) If the flow rate of ethylene at the beginning of the reaction (i.e. when conversion is 0) in the.
Countries’ presentation on internal quality control: IndonesiaExternalEvents
The second lab managers’ meeting of the South-East Asia Laboratory NETwork (SEALNET) took place on 19 - 23 November 2018 in ICAR-IISS (Indian Institute of Soil Science), Bhopal, India.
Ms. Lenita Herawaty and Ms. Linca Anggria, Laboratorium Pengujian, Balittanah, Soil Test Laboratory, Indonesian Soil Research Institute, Indonesia (2nd Day)
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2. Achievement Standard
Carry out an in-depth practical chemistry investigation involves:
developing a procedure for collecting primary data, with units, relevant to the purpose, based on
the manipulation of the independent variable over a valid range of values with repetition to show
reliability
controlling the variable(s) that could have a significant effect on the results
using techniques to increase the accuracy of the measured values of the dependent (and
independent) variable
processing and representing the data to enable a conclusion to be reached
writing a conclusion based on the processed data that links to the purpose of the investigation.
Carry out a comprehensive practical chemistry investigation involves an in-depth investigation that
also:
justifies the choices made to increase accuracy during the investigation
justifies the conclusion in terms of the processed data and the purpose of the investigation
relates investigation findings to applicable chemistry ideas.
3. Topic Plan
Basics – graphs, tables, report writing
Fair testing
Practice assessment 1 – Calcium Carbonate – step by step
Practice assessment 2 – Rhubarb – mark at the end +
feedback
Summative Assessment – submit for final grade, resubmits for
minor errors and those on grade boundaries only
4. Aim/Purpose – what you are trying to find out
Equipment – gear you are going to need
Hypothesis – the results you expect
Method – steps and diagram
- independent variables – thing you change
- dependent variables - result you record
- controlled variables – keep same to make fair test
Results – data and graph, averages, percentages, calculations
Conclusion – answers aim and refers to hypothesis
Discussion – links your results with scientific ideas
Evaluation – what went well, what and how you could have improved the experiment, how
reliable the results are
Experimental Format
5. Independent variable (that which you purposefully change) is in the left column,
Dependent variable (that which you measure) with the different trials is in the next
columns,
Average at the end (add up values and divide by how many values there are)
Title: Clearly state the purpose of the experiment, headings need to have units
Tables
Average
7. In order for an experiments results to be valid the experiment must
have been carried out fairly:
- Accurate - Measurements taken accurately
- Reliable - Experiment repeated
- Valid - Conditions controlled so that only one thing changes
- Reliable - Sufficient information is collected
- Repeatable - Sufficient details (including a diagram) are
recorded
Fair Tests
8. Independent Variable = thing you change,
include the range and units
Dependent Variable = results you record, include
the expected range and units
Controlled variables = things you keep the same
to make it a fair test, must say how you will keep
them the same
Variables;
9. If we wanted to test to see if Drive or Surf is a better washing powder what
would our:
Independent Variable be (thing we change)?
Brand of washing powder
Dependent Variable be (thing we record):
Measure stain size/weight or colour (using a colour chart)
Controlled Variables be (things we need to keep the same):
Amount of water in wash, amount of powder, size of stain, type of
clothing, washing cycle, water temperature, type of stain
Washing Powder
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23. Remember:
Students can discuss and plan their experiment in small groups, but everything
written in their assessment booklet must be done individually, test conditions
You must make up their own dilution series from a stock bottle. A good
suggestion is to record in their booklet as a table rather than having to explain
step by step.
as a time saver, make up the total amount of each acid dilution needed all at
once, rather than doing it trial by trial
really important that the conclusion relates/refers in some way to the aim written
at the beginning
Show some sort of processing of data - averaging/graph etc.
Talk about the collision theory for the higher grades
Must refer to rate/frequency/collisions per second. It's not enough to say there
were more collisions. Must link it to time/rate in some way.
24. Things to Remember:
Units, units units
Valid range (at least 4)
Repetition (at least 3)
Controlling the variable(s) – say what and how for at least 3.
Accurate method – details, amounts, units, times etc
Processing and representing the data – averages graphed, follow graphing rules
Conclusion links to the purpose of the investigation
Conclusion is justified using data from results
justifies the choices made to increase accuracy during the investigation
justifies the conclusion in terms of the processed data and the purpose of the investigation
Relates investigation findings to applicable chemistry ideas.
Justifies results validity of method
