About This Chapter
Historical Geology- Chapter Summary
Use the video and text lessons in this chapter to brush up on your understanding of fossils, including distinguishing characteristics and how scientists estimate a fossil's age. Learn what fossils can show us about changes in our planet over time. The subjects you'll study in this chapter include:
- Principles of uniformitarianism
- Types of fossils
- Definition of relative age
- Index fossils and fossil dating
- The fossil record
- How fossil evidence can demonstrate changes in the Earth's environment
The lessons in this chapter are taught by professional instructors who took great care in designing lessons that are brief, but informative. If you ever find yourself struggling through a lesson or if you want to ask a question, our instructors are here to help you with anything you need before you move forward.
1. Uniformitarianism: Definition, Principles & Examples
Uniformitarianism is an important concept in geology that addresses the consistent behavior of geological processes over time. Learn about the concept and significance of uniformitarianism in this lesson, and then test your knowledge with a quiz.
2. What is Relative Age? - Definition & Effect
How do geologists determine the age of different rock layers or fossils without the aid of modern equipment? Learn how geologists use rock layers to determine relative ages.
3. Relative Dating with Fossils: Index Fossils as Indicators of Time
You may already know how to date a fossil with a rock. But did you know that we can also date a rock with a fossil? Watch this video to find out how we use index fossils to establish the relative ages of rocks.
4. Law of Superposition: Definition & Concept
Superposition is one of the fundamental principles of stratigraphy. It is also a statement of the obvious (or seems to be). You will learn all about the concept in this lesson.
5. Fossil: Definition, Types, Characteristics & Examples
Fossils provide scientists with many clues about Earth's history, offering evidence of dinosaurs and strange plants that existed in the past. This lesson will define a fossil, look at different types and characteristics of fossils, and then describe how fossils are formed.
6. Fossil Record: Definition & Examples
This lesson teaches you about the fossil record. It explains how scientists learn about Earth's distant past and highlights what fossils can tell scientists about ourselves and other organisms.
7. Using Fossil Evidence to Evaluate Changes in Environment & Life Conditions
How can something that died tens of millions of years ago help people in the present day understand the past? In the case of fossils, these long-dead specimens can be perfect clues for figuring out changes in environment and life conditions.
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Other chapters within the GACE Middle Grades Science (014): Practice & Study Guide course
- Scientific Inquiry & Design
- Nature of Scientific Knowledge
- Major Developments & Historical Figures in Science
- Collecting & Analyzing Scientific Data
- Science Laboratory & Field Equipment Safety
- Environmental Effects of Science & Technology
- Energy Production & Natural Resource Management
- Science & Technology in Consumer Products
- The Atomic Model, Energy & Matter
- Concepts & Relationships Between Energy & Matter
- Basics of the Periodic Table
- Chemical Compounds & Reactions
- Acid-Base Chemistry
- Solutions & Solubility
- Basic Concepts of Mechanics
- Electricity & Magnetism Concepts
- Waves & Optics
- Structure & Function of Cells & Organelles
- Basic Biochemistry of Life
- Basic Genetics
- Evolution, Natural Selection & Biological Diversity
- Hierarchical Classification of Living Things
- Plant Structures & Function
- Animal & Human Anatomy & Physiology
- Population Dynamics & Ecology
- Intro to Rocks, Minerals & Soil
- Earth's Structure & Internal Processes
- Effects of Plate Tectonics
- Water Cycle
- Earth's Oceans & Landforms
- Freshwater Characteristics & Processes
- Atmosphere & Weather
- Climate & Seasons
- Exploring Features of the Solar System
- Earth-Moon-Sun System
- GACE Middle Grades Science Flashcards