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Ch 22: Conducting a Scientific Investigation

About This Chapter

Learn more about the basic instruction needed to conduct a scientific investigation with this chapter. These lessons and quizzes can be used to help you get the best score you can on an upcoming exam or homework assignment.

Conducting a Scientific Investigation - Chapter Summary

In this chapter, our instructors explain what a scientific investigation is, how they are conducted, and the variables and controls needed, as well as how to select the best tools for data collection and investigation. Qualitative and quantitative data are introduced, as is the importance of creating a well-written hypothesis. Laboratory safety techniques and how to select the right scientific models for your experiment are presented.

You will learn how to use precision when making measurements in science and how to improve the reliability and validity of your experiment. The concepts of accuracy and reproducibility as they relate to investigation will also be explored. How hypothesis, law and theory relate to each other is also covered, as is how to best present your scientific process either orally or in writing. Once you have completed these lessons, you should be able to:

  • Define scientific investigation and how they are conducted
  • Use the right tools for data analysis
  • Differentiate between qualitative and quantitative data
  • Write the kind of hypothesis that's needed in a well-designed experiment
  • Select appropriate scientific models
  • Practice precision and accuracy when taking measurements
  • Improve validity and reliability
  • Present the scientific process in writing or orally

Use the chapter tests and lesson quizzes to gauge your understanding of the topic. If you need to view just one part of a video lesson again, use the video tabs in the Timeline to jump directly to the section you'd like to re-watch. Our mobile-friendly videos and lessons are available for you to review 24 hours a day, seven days a week. If you have questions as you review the chapter, contact one of our instructors for help.

13 Lessons in Chapter 22: Conducting a Scientific Investigation
Test your knowledge with a 30-question chapter practice test
What is Scientific Investigation? - Definition, Steps & Examples

1. What is Scientific Investigation? - Definition, Steps & Examples

Scientific investigation is the way in which scientists and researchers use a systematic approach to answer questions about the world around us. Read on to find out more. A quiz is provided to test your understanding.

Variables & Controls in a Science Experiment

2. Variables & Controls in a Science Experiment

After watching this video, you will be able to explain how science experiments are conducted; what variables, controlled variables, and controls are: and why these things are important. A short quiz will follow.

Using Appropriate Tools for Scientific Tests & Data Collection

3. Using Appropriate Tools for Scientific Tests & Data Collection

A properly run experiment depends on using the right tools, both for data collection and analysis. In the end, it will save you time, money and frustration to spend some time planning out which tools are most appropriate for your work.

Qualitative vs. Quantitative Data in Various Research Methods

4. Qualitative vs. Quantitative Data in Various Research Methods

Qualitative data and quantitative data are both useful in research, but it is important to understand the differences between the two. Learn how to differentiate the two types of data in this lesson.

Designing an Experiment to Test a Given Hypothesis

5. Designing an Experiment to Test a Given Hypothesis

A well-written hypothesis is the key to any well-designed experiment. In this lesson, we'll work through the process of designing an experiment based on the hypothesis it's meant to test and see how the two work to complement each other.

Laboratory Safety Techniques: Protecting People and Equipment

6. 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.

Selecting Appropriate Models in Science

7. Selecting Appropriate Models in Science

Scientific models are used to describe physical phenomenon and are tested against real world data. In this lesson, you will become familiar with a real example of how scientists select appropriate models for their work including knowledge of their limitations.

Measurements & Uncertainty in Science

8. Measurements & Uncertainty in Science

In this lesson, you will discover the importance of precision and accuracy in science while learning to make measurements. Also, you will understand how to perform calculations with measurements that conserve precision and limit uncertainty.

How to Improve Validity of a Scientific Investigation

9. How to Improve Validity of a Scientific Investigation

This lesson explores one important measure of the quality of a scientific experiment: validity. Learn what validity is and how it can be improved in a scientific investigation.

Methods for Improving Measurement Reliability

10. Methods for Improving Measurement Reliability

Reliability is the consistency of the results of a measurement tool. But, what causes a tool to have low reliability? And, what can be done to improve reliability? In this lesson, we'll answer both of those questions.

Evaluating Data from Scientific Investigation

11. Evaluating Data from Scientific Investigation

After watching this video, you will be able to explain the meaning of the terms 'accuracy' and 'reproducibility,' or precision, as they relate to science experiments. A short quiz will follow.

Hypothesis, Theory & Law in Science

12. 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.

Presenting the Scientific Process Orally or in Writing

13. Presenting the Scientific Process Orally or in Writing

Part of being a good scientist involves sharing your work with others. Two of the most common ways this is done is through written works and oral presentations, both of which require a certain amount of care and skill.

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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