About This Chapter
1. Basaltic Lava: Definition & Characteristics
Basaltic lavas, the most abundant lava type on earth, are the focus of this lesson. By the end, you should understand where basaltic lava comes from and some of its common forms.
2. Extrusive Rocks: Definition & Examples
This lesson covers one of the types of igneous rocks, called extrusive rocks. By the end of this lesson, you should know the definition and some ways to identify extrusive rocks yourself.
3. Fossil Evidence: Definition & Overview
Fossils are critical tools in science because they give us clues to the types of plants and animals that lived on Earth in the past. In this lesson, you will learn about the types of fossils and how they were formed.
4. Intrusive Igneous Rock: Definition & Examples
Not all rocks form the same way; some have a very explosive beginning! In this lesson, we will discover how intrusive igneous rocks come into being and look at some examples. Then, you can test your knowledge with a quiz.
5. Intrusive Rocks: Definition & Examples
If you've ever looked up at Half Dome in Yosemite National Park, Mt. Rushmore in South Dakota, or Stone Mountain in Georgia, you were looking at intrusive rocks. We're going to investigate how these rocks form and how you can identify them in the field.
6. Obsidian: Definition, Properties & Uses
Obsidian is a unique kind of rock that has been renowned throughout history for its beauty and its ability to form sharp tools. In this lesson, we'll learn how obsidian forms and see some of its uses throughout history.
7. Rock Strata: Definition & Explanation
Rock strata are found almost everywhere, even on the tops of mountains. In this lesson, we'll learn what rock strata look like, how they form, and their importance to geologists. Then you can test your knowledge with a short quiz.
8. Sediment: Definition & Deposits
Learn about what materials make up sediment and how it travels. Explore sediment deposits from deltas to sand dunes, and learn how sedimentary rock is created.
9. Sir Charles Lyell: Theory & Biography
Read about Sir Charles Lyell, a lawyer and geologist who learned to read the evidence hidden in rocks. Learn about uniformitarianism and take a quiz to test your knowledge.
10. What is a Deposition? - Definition & Explanation
Discover the many ways deposits of rock and soil can alter landforms as big as islands, mountains, and river deltas in this lesson. You'll explore both quick and slow changes in the land around us, and learn some fascinating geologic terms along the way!
11. What is Coal? - Facts, Types, Formation & Uses
Did you know that each person uses 3.7 tons of coal annually? Did you also know that coal, as a fossil fuel, comes from a source that was once alive? Learn about coal, its current uses, and possible future.
12. What is Granite? - Definition & Colors
Two places where you might be most likely to encounter granite are kitchens and cemeteries. But the material's importance goes far beyond its uses because it forms the foundation of our continents. Learn all about it in this lesson.
13. Paleontology & Dinosaurs - Definition, History & Facts
For most of human history, paleontology was like the fossil evidence it is based on--undiscovered. Once unearthed, the science of paleontology grew rapidly, evolving in unpredictable ways. Learn the definition of paleontology and the history of this rock-solid science, then test your new knowledge with a quiz.
14. What is Sandstone? - Formation, Properties & Types
In this lesson, you will learn about sandstone, including how it is formed and how its formation influences the rock's framework, matrix, pore space, and cement. You'll be able to name sandstone types based on their characteristics.
15. Mount Pinatubo: Facts, Eruption & Effects
Mount Pinatubo in the Philippines is an active volcano that erupted in 1991. The eruption was one of the largest on record during the 20th century. This lesson will cover the facts about Mount Pinatubo and its eruption.
16. Mount Vesuvius: Facts, Eruptions & History
Mount Vesuvius is an active volcano in Italy. Over the past thousand years, there have been multiple eruptions, most notably in 79 AD. This lesson will cover the facts about Mount Vesuvius.
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