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Ch 22: Earth History: Homework Help

About This Chapter

The Earth History chapter of this Earth Science Homework Help course helps students complete their Earth history homework and earn better grades. This homework help resource uses simple and fun videos that are about five minutes long.

How it works:

  • Identify which concepts are covered on your Earth history homework.
  • Find videos on those topics within this chapter.
  • Watch fun videos, pausing and reviewing as needed.
  • Complete sample problems and get instant feedback.
  • Finish your Earth history homework with ease!

Topics from your homework you'll be able to complete:

  • The Big Bang Theory
  • Galaxy formation
  • Theories of the formation of the Earth
  • Theories of the formation of the moon
  • Structure of the sun
  • The life cycle of the sun
  • Major eras in the history of Earth

13 Lessons in Chapter 22: Earth History: Homework Help
Test your knowledge with a 30-question chapter practice test
Origins of the Universe: The Big Bang and Expanding & Contracting Universes

1. Origins of the Universe: The Big Bang and Expanding & Contracting Universes

Students will learn the origins of the universe, the Big Bang theory, the timeline of the universe, how the universe is still expanding to this day, and what astronomers expect the universe to look like in the future.

Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

2. Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

Discover what evidence exists to support the Big Bang theory of the birth of the universe. Learn how cosmic background radiation, the red shift of light and the ongoing expansion of the universe led scientists to believe that the universe was started with the Big Bang.

Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

3. Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

This lesson explains how galaxies form, starting with the Big Bang. You'll also learn about the solar nebula hypothesis and three galaxy types, including spiral, elliptical, and irregular galaxies.

Formation of the Earth: Theories

4. Formation of the Earth: Theories

In this lesson, the theory of how the planet Earth formed will be discussed. This includes looking at how it differentiated into three layers, how it formed its atmosphere, water, and land features, and how it continues to evolve today.

Formation of the Moon: Theories

5. Formation of the Moon: Theories

Explore the four major theories on the formation of the Moon. The theories include the fission theory, capture theory, condensation theory and giant impact theory. Also look at both information supporting and flaws found in these theories.

Structure of the Sun

6. Structure of the Sun

Discover the layers of the sun, including the core, radiative zone, convective zone, photosphere, chromosphere, and corona. Find out which layers you can see from Earth. Investigate what sunspots and solar flares are.

Stages of the Sun's Life Cycle

7. Stages of the Sun's Life Cycle

Discover our sun, the provider of energy for life on Earth. Learn how the sun was born, how it lives as a main sequence star, how it will age into a red giant and how it will die as a white dwarf.

The History of Life on Earth: Timeline and Characteristics of Major Eras

8. The History of Life on Earth: Timeline and Characteristics of Major Eras

The Earth is over 4.6 billion years old. Ever wonder what happened during certain time periods in that large amount of time? We will look at the major eons and eras of Earth's history along with important characteristics of each.

Transform Boundary: Definition, Facts & Examples

9. Transform Boundary: Definition, Facts & Examples

In this lesson, you will learn the meaning of the term 'transform boundary' in the context of plate tectonics. A number of features and examples of transform boundaries will be introduced. A short quiz will follow.

Proterozoic Eon: Timeline & Facts

10. Proterozoic Eon: Timeline & Facts

The Proterozoic eon was the last of the three eons during the Precambrian supereon. This lesson will cover the unique events that shaped this time period and will also allow you to take a quiz.

The Mesozoic Era: Facts, Events & Timeline

11. The Mesozoic Era: Facts, Events & Timeline

The Mesozoic Era began 252 million years ago with the largest mass extinction in Earth's history and ended 66 million years ago with the asteroid that killed off the dinosaurs. This lesson will cover the important events that occurred during the Mesozoic Era.

The Paleozoic Era: Definition, Timeline & Events

12. The Paleozoic Era: Definition, Timeline & Events

The Paleozoic Era spans almost 200 million years from 542 to 251 million years ago. It is defined by great explosion of life at the beginning of the era and ends with the largest mass extinction in the history of our planet. This lesson will cover the important features of Paleozoic Era.

Which Dinosaurs Were Herbivores?

13. Which Dinosaurs Were Herbivores?

A lot of people tend to think that all dinosaurs were meat eaters, like T. rex or modern day alligators. But this wasn't true! There were many herbivorous dinosaurs and this lesson goes over a few of them.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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