About This Chapter
Scientific Validity - Chapter Summary
Lesson topics in this thorough chapter include the importance of accuracy and precision while taking scientific measurements and how validity can be improved in your own investigations. Learn how to spot an unavoidable experimental error and then reduce it while investigating. Additional studies review why the order of magnitude is so closely related to scientific notation. After you have worked through these lessons, you should be able to:
- Understand how to discover the order of magnitude in real-life examples
- Identify possible sources of bias to avoid them in your investigations
- Detail the importance of repeated trials and know how to analyze them
If you prefer to work offline, many of our lessons offer printable transcripts that highlight vocabulary words and important concepts. Otherwise, you can access all the materials we offer in these chapters on your mobile phone, computer or tablet at any time. The help of one of our professional instructors is available if you find that you need it. Choose to watch an entire video lesson or use the video tabs feature to skip ahead directly to the subject you want to review.
1. 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.
2. Order of Magnitude: Definition & Examples
In this lesson, you will learn the definition of order of magnitude and how it is closely associated with scientific notation. You will also learn how to determine the quantity of orders of magnitude in numbers with interesting real-life examples. Following the lesson will be a brief quiz.
3. 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.
4. Identifying Sources of Unavoidable Experimental Error
Good data are essential for any experiment. But no matter how hard you try, error in your data is unavoidable. In this lesson, you'll learn about the types of unavoidable experimental error to be on the lookout for and how to reduce their occurrence in your data.
5. How to Avoid Bias in Scientific Investigations
In this lesson, you will learn what it takes to conduct a proper scientific investigation while doing your best to avoid any possibility of bias. Learn where possible sources of bias can come from and what you can do about it.
6. Repeated Trials: Definition & Purpose
Repeated trials make the data you collect in experiments more reliable. Learn what repeated trials are, and find out how to record, organize, and analyze them.
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Other chapters within the HSC Biology: Exam Prep & Syllabus course
- Scientific Investigations Overview
- Data Collection & Analysis in Science
- Scientific Presentations
- Internal & External Environments
- Gas & Nutrient Transport in Animals & Plants
- Regulation in Animals & Plants
- Chromosomal Structure & Inheritance
- Mendel & Gene Expression
- Mechanisms of Genetic Change
- DNA Replication & Protein Synthesis
- Recombinant DNA Technology
- Biotechnology Basics
- Genetic Engineering & Reproductive Technologies
- Classification Hierarchy
- Health & Disease
- Immune Response
- Nervous System & Sensory Mechanisms
- Anatomy & Disorders of the Eye
- Sound & Hearing
- Evolutionary Change
- Time & Human Evolution
- History of Botany
- Photosynthesis Basics
- HSC Biology Flashcards