About This Chapter
Praxis General Science: Methodology, Techniques and History - Chapter Summary
In this chapter, we'll teach you all about experimental design, the scientific method and qualitative and quantitative research, as well as a host of other essential topics related to methodology, history or techniques. These lessons will cover:
- Scientific research
- The scientific method
- Experimental design
- Quantitative vs. qualitative research
- Validity and reliability in studies
- The history of science
- Common laboratory equipment
- Laboratory safety
- The Metric System and scientific notation
Our professional instructors will teach you what you need to know about methodology, science history and the essentials behind laboratory safety. With our informative, easy to navigate video lessons at your arsenal you'll be able to breeze through those topics on the Praxis General Science exam.
Praxis General Science: Methodology, Techniques & History Chapter Objectives
The Praxis General Science exam is designed to test your readiness to receive a teaching license and instruct a classroom by measuring your understanding in general science topics. The Methodology, Techniques & History chapter will help you answer questions in the Scientific Methodology, Techniques, and Development category, which has approximately 15 questions and accounts for roughly 11% of the exam. This lesson will give you the knowledge you need to answer these methodology, technique and scientific history multiple-choice questions with confidence. Along with our video lessons, given by academic professionals, you'll also be given short self-assessment quizzes to test your own progress and proficiency at the end of each lesson.
1. What is Scientific Research?
This lesson will discuss important components of scientific research, including the scientific method, peer review, statistical significance, and more!
2. The Scientific Method: Steps, Terms & Examples
The scientific method is more than just hypotheses and experiments. In this lesson, we'll explore the themes and variations that make up the world of science.
3. Experimental Design in Science: Definition & Method
What are the requirements of a scientific experiment? How do scientists turn hypotheses into theories and laws? Learn the answers to these questions and more in this lesson on the design of scientific experiments.
4. Quantitative vs. Qualitative Research
In this lesson, we identify the differences between quantitative and qualitative research methods in the social sciences. We also discuss the advantages and disadvantages of each approach.
5. How to Interpret Tables, Graphs & Charts of Scientific Data: Practice Problems
In this lesson, we will look at some practice problems involving tables, graph, and charts. We will specifically look at x- and y-axis graphs, pie charts, and bar graphs.
6. Validity and Reliability: How to Assess the Quality of a Research Study
Many psychologists and teachers complete research studies. How can you tell if a study was done well? This lesson will cover many criteria for a good quality study, including types of reliability and validity.
7. The History of Science: Events, Contributions & Theories
In this lesson, we discuss a few significant events in science's history. We will see how science has changed over the years as we start to question what we think we know.
8. Common Laboratory Equipment: Types & Uses
Biologists use all kinds of equipment in their labs to run their experiments. In this lesson, you'll identify some of the most common pieces of equipment as well as when you should or shouldn't use them.
9. Laboratory Safety Techniques: Protecting People and Equipment
Laboratory safety is not fun, but following the rules ensures that lab activities can be enjoyed by everyone. In this lesson, we cover some basic lab safety rules to follow that will help lab time be both safe and fun.
10. Standard Laboratory Safety Equipment
Even with proper precautions, lab accidents do happen. When they do, knowing what safety equipment is in your lab, where it is located, and how to use it can prevent further harm to both the lab and the people working in it.
11. Working with Biological Specimens Safely in the Lab
Working with biological specimens can be interesting and rewarding. But we need to be careful when handling and disposing of these types of specimens because they do have the potential to do harm both in and out of the lab.
12. Safe Chemical Storage, Use & Disposal
An important part of lab safety involves the correct usage, storage, and disposal of chemicals. Lab safety is everyone's responsibility, so it's important that you know the proper procedures and protocols for using chemicals in the lab.
13. Understanding Laboratory Measurements: Units & Types
There are many different units that can be used for measurements. This may not only lead to incorrect data measurements, but also to confusion about which units are most appropriate. Therefore, a standard set of units is used for each type of measurement in the biology lab.
14. The Metric System: Units and Conversion
Just like you and your friend communicate using the same language, scientists all over the world need to use the same language when reporting the measurements they make. This language is called the metric system. In this lesson we will cover the metric units for length, mass, volume, density and temperature, and also discuss how to convert among them.
15. Significant Figures and Scientific Notation
Are 7.5 grams and 7.50 grams the same? How do scientists represent very large and very small quantities? Find out the answers to these questions in this video.
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