About This Chapter
AEPA General Science: The Universe - Chapter Summary
Explore definitions and theories related to the universe throughout this chapter. Learn more about its origins and evolution by watching online video lessons on topics such as the Big Bang theory, the solar system and cosmic expansion. While you prepare for the AEPA General Science examination, you could also accumulate more information about the stars, comets and planets of the universe. This chapter might provide assistance with:
- Identifying the differences between the galaxy, the universe and the solar system
- Exploring contracting and expanding universes along with evidence of the Big Bang theory
- Discussing Olbers' paradox
- Comparing the entire universe to the observable universe
- Contrasting the Steady State theory and the Big Bang theory
- Defining photons and nucleosynthesis
- Describing the early universe and explaining the cosmological principle
- Learning more about the three models of the universe
- Discussing hot and cold dark matter
- Understanding the universe's acceleration and calculating its age
- Assessing the curvature of the universe
Your exploration of these topics could lead to your accurately answering related questions on the AEPA General Science examination. The video lessons in this chapter are animated and fun to watch. Narrated by experts, they're about five to ten minutes long. In addition to accompanying text transcripts and printable worksheets, you'll find an ask-a-question feature and navigational video tags that facilitate learning. Self-assessment quizzes round out the lessons.
1. Solar System, Galaxy, & Universe: Definitions & Difference
Want to learn what the universe, galaxy, and solar system are as well as some cool facts about each one? This lesson will give you an overview of what these three things are in a relatable fashion.
2. 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.
3. Olbers' Paradox & Cosmic Expansion: Nature of the Universe
Why is the night sky dark if there are so many stars in the universe? It used to be thought our universe had several properties that we now know not to be true. This lesson will explain what all that means and why the night sky isn't as bright as the sun.
4. The Observable Universe vs. the Entire Universe
This lesson will tie in the concepts of our observable universe, redshift, and the cosmic light horizon to explain why we cannot see the entire universe.
5. The Steady State Theory vs. the Big Bang Theory
Did you know that the Big Bang wasn't always a well-accepted theory of our universe? There was a competing theory called the Steady State theory. Find out what it was all about and why its proponent actually helped name the Big Bang theory.
6. 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.
7. Photons, Particle Soup & Nucleosynthesis
This lesson will explore what happened in the fractions of a second and minutes after the Big Bang occurred. You'll learn about matter, antimatter, photons, deuterons, positrons, and a lot more!
8. The Evolution of the Early Universe
This lesson will describe four important stages of development in the early universe, the radiation era, recombination (decoupling) epoch, the dark age, and reionization era.
9. The Cosmological Principle
This lesson will dive into the famous cosmological principle by defining and explaining isotropy and homogeneity as well as their important implications for our universe.
10. Three Models of the Universe: Flat, Open & Closed
This lesson will describe three models of the universe, including closed, open, and flat, as well as critical density and which model is most likely the correct one.
11. Hot & Cold Dark Matter & WIMPs
Neutrinos, neutralinos, axinos, gravitinos, and what the inos! Dark matter is a crazy thing and there are many different kinds of dark matter. This lesson will go over what they are and what they might be made of.
12. Cosmic Inflation: Solving the Flatness & Horizon Problems
The standard Big Bang theory doesn't explain everything in our universe, namely the horizon problem and flatness problems. This lesson will explain what does, inflation, and how so.
13. The Acceleration of the Universe
The acceleration of our universe is driven by a mysterious dark energy, which can take more than one form. This dark energy helps to explain why our universe is flat.
14. How To Calculate the Age of the Universe
This lesson will explain to you how old our universe is and how we calculate it thanks to the Hubble law and Hubble constant as well as one other simple equation.
15. The Universe's Curvature, Age & Fate
What is the age of our universe? What shape does it take? What determines the fate of our universe and what is this fate? This lesson will tell you all of this and more!
16. Using Telescopes, Spectroscopes & Probes to Investigate the Universe
Humans are explorers. It's exciting, but it also leads to great discoveries about the universe. Learn how we use telescopes, probes and spectroscopes to investigate the universe.
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Other chapters within the AEPA General Science (NT311): Practice & Study Guide course
- General Science: Scientific Inquiry
- General Science: Scientific Laws & Theories
- General Science: Scientific Data & Analysis
- General Science: Laboratory Equipment & Safety
- General Science: Science & Society
- General Science: Science in Daily Life
- General Science: Organization of Matter
- General Science: Characteristics of Matter
- General Science: Atomic Structure
- General Science: Nuclear Chemistry
- General Science: Energy & Matter
- General Science: Simple Compounds & Chemical Formulas
- General Science: Types of Chemical Reactions
- General Science: The Mole Concept
- General Science: The Periodic Table
- General Science: Chemical Reactions
- General Science: Equilibrium
- General Science: Acid-Base Chemistry
- General Science: Solutions & Solubility Factors
- General Science: Physics & Motion
- General Science: Newton's Laws
- General Science: Analyzing Motion
- General Science: Analyzing Forces
- General Science: Electrical Concepts
- General Science: Magnetic Fields & Forces
- General Science: Electromagnetic Spectrum
- General Science: Waves, Optics & Sound
- General Science: Cell Structure & Function
- General Science: Cell Reproduction & Division
- General Science: Biochemistry of Life
- General Science: Characteristics of Living Organisms
- General Science: Plant Structures & Functions
- General Science: The Circulatory System
- General Science: The Nervous System
- General Science: The Immune & Endocrine Systems
- General Science: Other Physiological Systems
- General Science: Reproduction & Development
- General Science: Basic Genetics
- General Science: DNA Transcription & Translation Process
- General Science: Genetic Engineering
- General Science: Evolution
- General Science: History of Life
- General Science: Ecosystems
- General Science: Community & Population Ecology
- General Science: Earth Materials
- General Science: Rocks & Minerals
- General Science: Historical Geology
- General Science: Erosion, Weathering & Wasting
- General Science: Earth's Structure & Processes
- General Science: Plate Tectonics
- General Science: The Water Cycle
- General Science: Oceans
- General Science: Glaciers
- General Science: Other Bodies of Water
- General Science: Earth's Atmosphere & Climate
- General Science: Basic Weather Concepts
- General Science: The Solar System
- General Science: Earth, Moon & Sun
- General Science: Characteristics of the Moon
- General Science: Orbits of Celestial Bodies
- AEPA General Science Flashcards