Ch 1: Praxis General Science: Methodology, Techniques & History

About This Chapter

Watch our short, informative video lessons to review what you need to know about scientific methodology and experimental techniques. As part of our Praxis General Science test preparation course, this Methodology, Techniques & Practice chapter will help you succeed on the exam.

Praxis General Science: Methodology, Techniques and History - Chapter Summary

In this chapter, we'll help you review the scientific method, qualitative and quantitative research, and a host of other essential topics related to scientific methodology, history and techniques as you prepare for the Praxis General Science exam. These lessons ensure you'll be able to do the following:

  • Explain the nature of science, the scientific method and how to process and apply scientific knowledge
  • Interpret scientific data, tables, graphs and charts
  • Assess the quality research studies and evaluate data accuracy and error
  • Identify important events, contributions and theories in science history
  • Discuss laboratory equipment and safety
  • Utilize common laboratory measurements, the units of the metric system and scientific notation
  • Examine unifying themes of science and how to apply scientific knowledge
  • Explain hypothesis, theory and law in science

Our professional instructors 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.

15 Lessons in Chapter 1: Praxis General Science: Methodology, Techniques & History
Test your knowledge with a 30-question chapter practice test
The Nature of Science

1. The Nature of Science

This lesson will explore the basic nature of science. It will distinguish science from pseudoscience and hypothesis from theory and natural law; it will give plenty of examples of each.

Unifying Themes, Principles & Relationships in Science

2. Unifying Themes, Principles & Relationships in Science

Learn the true definition of science and explore the main themes and principles to understand how science helps us find relationships in the natural world. Take a quiz to test what you know.

Hypothesis, Theory & Law in Science

3. Hypothesis, Theory & Law in Science

In this lesson, learn how to define hypothesis, theory, and law in science. Then, discover the ways that these ideas are related to each other and how they help us to explain the universe around us.

How to Process & Apply Knowledge in Science

4. How to Process & Apply Knowledge in Science

In this lesson you'll be learning about analytical skills that will help you become a better scientist. Here, you'll learn how observing, making comparisons and inferences, generalizing, and applying data can help you reach scientific conclusions.

The Scientific Method: Steps, Terms & Examples

5. 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.

How to Interpret Tables, Graphs & Charts of Scientific Data: Practice Problems

6. 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.

Validity and Reliability: How to Assess the Quality of a Research Study

7. 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.

Evaluating Data: Precision, Accuracy & Error

8. Evaluating Data: Precision, Accuracy & Error

The data you present as a scientist needs to be as accurate, precise and error-free as possible. In this lesson, we'll discuss what each of these terms means, as well as how error is introduced into measurements and other data collection.

The History of Science: Events, Contributions & Theories

9. 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.

Common Laboratory Equipment: Types & Uses

10. 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.

Laboratory Safety Techniques: Protecting People and Equipment

11. 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.

Standard Laboratory Safety Equipment

12. 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.

Understanding Laboratory Measurements: Units & Types

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.

The Metric System: Units and Conversion

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.

Significant Figures and Scientific Notation

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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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