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Ch 18: Holt McDougal Earth Science Chapter 18 - Studying Space

About This Chapter

The Studying Space chapter of this Holt McDougal Earth Science Online Textbook Help Course helps students learn essential earth science lessons on studying space. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Studying Space textbook chapter.

How it works:

  • Identify the lessons in the Holt McDougal Studying Space chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the studying space topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Methods for telling time in ancient times
  • Geocentric, heliocentric and Ptolemaic models of the universe
  • Copernican Revolution
  • Tyco Brahe's contributions to astronomy
  • Galileo and the telescope
  • Sir Isaac Newton's connection to astronomy
  • Radio, refracting and reflecting telescopes
  • Nature of light
  • Name origins of the constellations

Holt McDougal is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

9 Lessons in Chapter 18: Holt McDougal Earth Science Chapter 18 - Studying Space
Telling Time in Ancient Times

1. Telling Time in Ancient Times

This lesson will explore the concepts of time and telling time in ancient history, including the lunar phase cycle, the calendar, the sundial, and how ancient people viewed time compared to us.

Geocentric, Heliocentric & Ptolemaic Models of the Universe

2. Geocentric, Heliocentric & Ptolemaic Models of the Universe

This lesson will lay out for you how ancient Greek philosophers came up with their models of the universe,. We'll also look at who Ptolemy was and what he contributed, and whether or not the Greeks were correct.

The Copernican Revolution

3. The Copernican Revolution

This lesson will discuss a famous astronomer by the name of Nicolaus Copernicus, his early history, his revolutionary idea, and why his model of the universe was actually wrong.

Tycho Brahe's Contribution to Astronomy

4. Tycho Brahe's Contribution to Astronomy

There was a man who did not believe Ptolemy's version of the universe nor did he believe in Copernicus's views on the universe. Who was this daring man? He was Tycho Brahe. We'll learn about him in this lesson.

Galileo, the Telescope & the Church

5. Galileo, the Telescope & the Church

This lesson explores the contributions of Galileo to modern science. It examines his early steps toward a scientific method, his work on falling bodies and, of course, his astronomical discoveries. Finally, the Church's reaction to these discoveries is explored.

Sir Isaac Newton And Astronomy

6. Sir Isaac Newton And Astronomy

This lesson will teach you about Newton's laws of motion and universal gravitation as well as why the moon doesn't fly off into space and why it doesn't crash into the Earth.

Types of Telescopes: Radio, Reflecting & Refracting Telescopes

7. Types of Telescopes: Radio, Reflecting & Refracting Telescopes

Learn about the different types of telescopes that astronomers use: X-ray, radio, gamma ray, reflecting and refracting. Learn what the differences are between them and what different things they show us about the universe.

The Nature of Light: Origin, Spectrum & Color Frequency

8. The Nature of Light: Origin, Spectrum & Color Frequency

This lesson introduces the basics of visible light and color. Learn how the visible light spectrum is divided into the six color ranges. We'll also discuss why different people name colors in different ways.

The Constellations: Definition & Name Origins

9. The Constellations: Definition & Name Origins

This lesson will teach you about ancient constellations and how they came to be. We'll define modern constellations and learn why they're important. You'll also learn about the differences between a constellation and an asterism.

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