Sample Core Video

Our online prep programs include Core Videos like this one teaching every key topic on your exam.

Below is a complete list of the Core Videos that are included in all of our Praxis General Science: Content Knowledge Online Prep programs.

These videos were created by our team of teachers and subject matter experts based on the official Praxis Science content specifications.

• Unifying Processes of Science
• Developing Theories, Models and Laws
• Process Skills
• Systems of Measurement
• Scientific Notation
• Organization and Presentation of Data
• Interpreting and Drawing Conclusions from Data in Tables, Graphs, Maps and Charts
• Data and Error Analysis
• Preparation, Storage, Use and Disposal of Lab Materials
• Using Standard Equipment in the Lab and Field
• Lab Safety and Emergency Procedures
• Major Historical Developments in Science
• Atoms, Elements, Molecules and Compounds
• Physical and Chemical Changes
• Physical Properties of Matter
• How Chemical Substances are Characterized by Physical Properties
• States of Matter and the Role Energy Plays
• Chemical Bonding, Reactivity and Position in the Periodic Table
• The Basic Components within an Atom
• Isotopes
• The Principle of Conservation of Energy and Energy Transfer
• The Direction of Heat Flow in a System
• Principles of Conservation of Matter and Chemical Reactions
• How Chemical Energy in Fuel is Transformed to Heat
• The Transfer of Energy as Heat
• The Methods of Heat Transfer
• The Construction of Organization of the Periodic Table
• Position in the Periodic Table and Elemental Characteristics
• Experiments that Induce a Physical Change
• Chemical Changes in Materials
• Observable Properties of Acidic, Basic, and Neutral Solutions
• Position, Distance and Displacement
• Speed, Velocity, Acceleration and Time
• Calculations for Linear and Circular Motion
• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• Forces that Act on a Body
• Different Forces in Nature
• Newton's Law of Universal Gravitation
• Density, Sinking and Floating
• Pressure, Fluid Flow and Buoyancy
• Overview of Simple Machines
• Mechanical Advantages for Inclined Planes
• Mechanical Advantages for Levers
• Mechanical Advantages for Pulleys
• Electrostatic and Magnetostatic Phenomena
• Attraction/Repulsion Observations
• Direction of Magnetic Fields
• Electric Currents and Magnetic Fields
• Series and Parallel Circuits
• Power, Voltage Differences, Current and Resistance in Simple Circuits
• The Characteristics of Sound, Light and Seismic Waves
• Mechanical Waves
• Electromagnetic Waves
• Lenses and Optical Systems
• The Laws of Reflection
• The Laws of Refraction
• Transmission of Light in Matter
• Absorption or Reflection of Light in Matter
• Role of Inorganic and Organic Compounds within Living Systems
• Carbohydrates and Lipids in Living Organisms
• Structure and Function of Organelles and Cells
• Levels of Organization in Plants and Animals
• Structures and Functions of Human Body Systems
• Single-Celled and Multicellular Organisms, Mitosis and Meiosis
• Animal and Plant Cells and the Energy of the Cell
• Aerobic and Anaerobic Respiration
• Photosynthesis and Respiration
• Proteins and Nucleic Acids in Living Organisms
• Protein Synthesis
• DNA Replication
• Coding of DNA and Expression of Traits
• The Role of Dominant and Recessive Traits in Genetics and Evolution
• Phenotypes, Genotypes and Incomplete Dominance (You are currently viewing this free sample video)
• Monohybrid and Dihybrid Crosses
• Mutations and Their Causes
• Evolution and Natural Selection
• Adaptation, Speciation and Extinction
• The Life Processes of Various Plant Groups
• Sexual and Asexual Reproduction
• Population Types and Size
• Flow of Matter and Energy through Ecosystems
• Interrelationships within an Ecosystem
• The Role of Key Organisms within an Ecosystem
• The Rock Cycle
• Earth Materials as Resources
• Density and Buoyancy in Relation to Plate Tectonics
• Types of Plate Boundaries
• Volcanoes, Earthquakes and Earth Resources Caused by Tectonic Processes
• Various Factors in the Damage Caused by an Earthquake
• Uniformitarianism and Catastrophism
• Erosion, Deposition and Transport
• Effects of Natural Hazards and Human Responses
• The Water Cycle
• Relative and Absolute Dating Techniques
• Major Events that Affected the Evolution of Life on Earth
• The Effects of Air Movements on Weather
• Weather Maps and Weather Patterns
• Factors Affecting Climate
• Chemical Composition and Physical Structure of the Universe
• Structure of the Solar System and Its Place in the Galaxy
• Stars' and Planets' Characteristics
• Fusion in Stars
• Paleontology
• Eclipses, Lunar Phases and Tides
• The Calendar, Time Zones, and Seasons
• Astronomical Instruments and Astronomical Units
• Energy Resources
• Renewable Resources
• Extraction and Recycling
• Sustainable Uses of Resources
• Environmental Consequences of Resource Consumption
• Science in Consumer Products
• Science in Communication
• Science in Agriculture
• Forensic Science
• Detrimental Impacts of Technology on the Environment
• Personal Health

When you enroll in Praxis General Science Online Prep, you'll get access to Core Videos covering every test domain, including Scientific Methodology, Techniques and Development; Physical Sciences; Life Sciences; Earth Sciences; and Science, Technology and Society.

Your prep program also includes Test Tutoring Videos in which an experienced teacher discusses each question on your full-length practice test. You'll learn how to apply the subject matter knowledge from our Core Videos to the types of questions you'll encounter on the real exam.