About This Chapter
How it works:
- Identify which concepts are covered on your universe homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample questions and get instant feedback.
- Finish your universe homework with ease!
Topics from your homework you'll be able to complete:
- Origins of the universe
- Star formation
- Types of telescopes
- Galaxy formation
- Star types by size, color and life cycle
- Structure and layers of the sun
- Life cycle of neutron stars and black holes
- Inner, outer and dwarf planets of the solar system
- Asteroids, meteorites and comets
- Theories on the formation of Earth and the moon
1. Geologic Time Scale: Major Eons, Eras, Periods and Epochs
The geologic time scale is an essential tool for understanding the history of Earth and the evolution of life. In this lesson, explore the principal eons, eras, periods, and epochs that help us track major events in geologic history.
2. Theories of Geological Evolution: Catastrophism vs Uniformitarianism
Geologists haven't always agreed about the history of our planet. They have debated between catastrophism and uniformitarianism over the last few hundred years! Learn about the two main theories of geologic evolution and how scientists came to resolve the dispute.
3. Methods of Geological Dating: Numerical and Relative Dating
Learn how scientists determine the ages of rocks and fossils. We'll explore both relative and numerical dating on our quest to understand the process of geological dating. Along the way, we'll learn how stratigraphic succession and radioactive decay contribute to the work of paleontologists.
4. What is Relative Dating? - Law of Superposition, Principles of Original Horizontality & Cross-Cutting Relationships
Discover how geologists study the layers in sedimentary rock to establish relative age. Learn how inclusions and unconformities can tell us stories about the geologic past. We'll even visit the Grand Canyon to solve the mystery of the Great Unconformity!
5. Principles of Radiometric Dating
Radiometric dating is a method used to determine the age of rocks and other materials based on the rate of radioactive decay. Learn about three common types of radioactive decay: alpha decay, beta decay and gamma decay.
6. Radiometric Dating: Methods, Uses & the Significance of Half-Life
Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes. Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson.
7. Conditions of Fossil Preservation: Rapid Burial, Hard Parts & the Elements
Learn how fossils are formed and how varying conditions affect the preservation of organisms. What is the best way for a dinosaur to become fossilized? Find out here!
8. 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.
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Other chapters within the High School Physical Science: Homework Help Resource course
- Physical Science - Understanding Matter: Homework Help
- Physical Science - Understanding Gases: Homework Help
- Understanding the Atom & Atomic Structure in Physical Science: Homework Help
- Physical Science - The Periodic Table: Homework Help
- Physical Science - Understanding Chemical Bonding: Homework Help
- Physical Science - Understanding Solutions: Homework Help
- Physical Science - Stoichiometry: Homework Help
- Homework Help - Acids, Bases & Chemical Reactions in Physical Science
- Physical Science - Atomic and Nuclear Physics: Homework Help
- Physical Science - Understanding Motion: Homework Help
- Physical Science - Force, Motion, and Newton's Laws: Homework Help
- Homework Help for Work, Energy, Power and Thermodynamics in Physical Science
- Physical Science - Waves, Sound, and Light: Homework Help
- Physical Science - Electricity: Homework Help
- Physical Science - Thermal Physics: Homework Help
- Physical Science - Magnetism: Homework Help
- Physical Science - Intro to Organic Chemistry: Homework Help
- Physical Science - Atmospheric Science: Homework Help
- Physical Science - Geologic Time: Homework Help
- The Earth and its Internal Structure: Homework Help
- Physical Science - Plate Tectonics: Homework Help
- Physical Science - Minerals and Rocks: Homework Help
- Physical Science - Igneous Rocks: Homework Help
- Sedimentary Rocks: Homework Help
- Metamorphic Rocks: Homework Help
- Physical Science - Volcanoes: Homework Help
- Physical Science - Earthquakes: Homework Help
- Physical Science - Weathering and Erosion: Homework Help
- Physical Science - Water Balance: Homework Help
- Physical Science - Ground Water: Homework Help
- Physical Science - Coastal Hazards: Homework Help