Physics Concepts Quiz - Med
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Questions and Answers

What is the rebound of a light wave from a surface back toward the medium from where it came?

  • Absorption
  • Refraction
  • Reflection (correct)
  • Diffraction
  • What is the average distance between the nucleus and the outermost electron in an atom called?

  • Electron cloud
  • Atomic radius (correct)
  • Bohr radius
  • Nuclear radius
  • What is the change in the direction of a light wave when it passes through a transparent medium with a different optical density from the one in which the wave had been traveling?

  • Reflection
  • Absorption
  • Diffraction
  • Refraction (correct)
  • What is the portion of the electromagnetic spectrum that is visible because of its ability to stimulate the retina?

    <p>Visible light</p> Signup and view all the answers

    What is the rebound of a light wave from a surface back toward the medium from where it came?

    <p>Reflection</p> Signup and view all the answers

    What is the term for the amount of light a material reflects?

    <p>Reflectance</p> Signup and view all the answers

    What is the scientific notation for 6,300?

    <p>$6.3 \times 10^{3}$</p> Signup and view all the answers

    Which statistical measure describes the middle number in a set of data?

    <p>Median</p> Signup and view all the answers

    According to the laws of thermodynamics, what does the second law primarily focus on?

    <p>Entropy increase</p> Signup and view all the answers

    What is the principle that heat tends to spread out uniformly known as?

    <p>Entropy</p> Signup and view all the answers

    How is temperature defined in terms of the average kinetic energy of an object's particles?

    <p>The average kinetic energy of an object's particles</p> Signup and view all the answers

    What is the difference between mass and weight?

    <p>Mass is a measure of the amount of substance, weight is the gravitational pull</p> Signup and view all the answers

    What is a scientific fact?

    <p>An event or effect that is observed and can be repeated or demonstrated to others</p> Signup and view all the answers

    What is a scientific theory?

    <p>A proposition explaining why or how something happens</p> Signup and view all the answers

    What is a hypothesis?

    <p>An educated guess that is not yet proven</p> Signup and view all the answers

    What is a law in scientific terms?

    <p>An explanation of events that always leads to the same outcome</p> Signup and view all the answers

    Which domain of scientific knowledge studies ecosystems made up of biological and geological factors?

    <p>Ecology</p> Signup and view all the answers

    What does scientific knowledge refer to?

    <p>Topics studied based on observation in an objective way</p> Signup and view all the answers

    Which system is the standard of measurement in the scientific community?

    <p>Metric system</p> Signup and view all the answers

    What is the basis of the International System of Units (SI)?

    <p>Meter-Kilogram-Second (MKS) system</p> Signup and view all the answers

    What is used to determine the accuracy of measurements?

    <p>Significant figures</p> Signup and view all the answers

    In what situations is estimation typically used?

    <p>When complete accuracy is not necessary</p> Signup and view all the answers

    What are the two classifications of errors in experiments?

    <p>Random errors and systematic errors</p> Signup and view all the answers

    What is scientific notation used for?

    <p>Representing very large or very small values in an impractical format</p> Signup and view all the answers

    What is a simple circuit?

    <p>A closed conducting path between high and low potential points</p> Signup and view all the answers

    What is the representation of the magnetic field?

    <p>Invisible lines showing paths of attraction and repulsion</p> Signup and view all the answers

    What is an electromagnet?

    <p>Formed by electric current flowing through a wire and inserting a ferromagnetic material within the coil</p> Signup and view all the answers

    What causes a material to exhibit magnetic force?

    <p>Magnetic domains where the magnetic fields of atoms are grouped and aligned</p> Signup and view all the answers

    What is sound?

    <p>A pressure disturbance that travels through a medium as mechanical waves</p> Signup and view all the answers

    What does the Doppler effect describe?

    <p>The change in perceived frequency of waves due to relative motion between the source and the observer</p> Signup and view all the answers

    Study Notes

    Physics Concepts and Principles

    • Diamagnetic materials have paired electrons and usually have no magnetic moment, but some can exhibit weak magnetic fields.
    • A simple circuit is a closed conducting path between high and low potential points, such as a battery's positive and negative terminals.
    • Examples of circuits include the flow from one terminal of a car battery to the other, and using a D cell battery, light bulb, and wire to create a circuit.
    • Magnets, such as iron or steel, can attract or repel other substances and have two poles: north and south.
    • The magnetic field is represented by invisible lines showing paths of attraction and repulsion.
    • Magnetism can occur naturally, or ferromagnetic materials can be magnetized to become permanent magnets.
    • An electromagnet can be formed by electric current flowing through a wire and inserting a ferromagnetic material like an iron bar within the coil.
    • Magnetic domains occur when the magnetic fields of atoms are grouped and aligned, causing a material to exhibit magnetic force.
    • Motion is a change in the location of an object resulting from an unbalanced net force, requiring an understanding of displacement, velocity, and acceleration.
    • Sound is a pressure disturbance that travels through a medium as mechanical waves, transferring energy through atomic particle vibrations.
    • Sound waves consist of compressions and rarefactions, and different sounds have different wavelengths.
    • The Doppler effect describes the change in perceived frequency of waves due to relative motion between the source and the observer, observable in sound and electromagnetic waves.

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    Related Documents

    Scientific Knowledge GED.docx

    Description

    Test your knowledge of physics concepts and principles with this quiz. Explore topics such as magnetism, circuits, motion, sound waves, and the Doppler effect. Learn about diamagnetic materials, simple circuits, magnetic fields, electromagnets, magnetic domains, displacement, velocity, acceleration, and more.

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