Gr 10 Physical Sciences Ch 9:Particle-like nature of EM radiation
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Questions and Answers

What is the proposed reason for dogs and cats exhibiting unusual behavior before natural disasters?

  • Their sensitivity to vibrations on the Earth's surface
  • Their heightened senses, particularly their sense of smell (correct)
  • Their ability to sense the Earth's tilting
  • Their ability to detect changes in air pressure

    • What is the observed behavior of sharks before hurricanes?

  • They move to shallower waters
  • They move to deeper waters (correct)
  • They become more aggressive
  • They change their feeding patterns

    • Why do scientists think rodents might be able to predict natural disasters?

  • They are sensitive to changes in air pressure
  • They are sensitive to subtle changes in the Earth's tilting (correct)
  • They have a heightened sense of smell
  • They are sensitive to vibrations on the Earth's surface

    • What is the proposed reason for elephants' behavior before tsunamis?

    <p>Their sensitivity to vibrations on the Earth's surface</p> Signup and view all the answers

    What is the main argument against the reliability of animal behaviors as predictors of natural disasters?

    <p>The behaviors are often noted only in hindsight, leading to bias</p> Signup and view all the answers

    What is the proposed reason for why animals might be able to detect natural disasters before humans?

    <p>They are able to detect certain natural signals earlier than humans</p> Signup and view all the answers

    What is the similarity between animal behaviors and human reactions to natural disasters?

    <p>They are both basic survival instincts</p> Signup and view all the answers

    What is an example of how bias can occur in reporting animal behaviors?

    <p>When a dog crosses the road and an earthquake follows shortly after</p> Signup and view all the answers

    What is the concept known as wave-particle duality associated with?

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

    What is the value of Planck's constant?

    <p>6.63 × 10^(-34) J·s</p> Signup and view all the answers

    What is the relationship between the energy of a photon and its frequency?

    <p>The energy of a photon increases with higher frequency</p> Signup and view all the answers

    What is the relationship between the energy of a photon and its wavelength?

    <p>The energy of a photon decreases with longer wavelength</p> Signup and view all the answers

    What type of radiation do photons exhibit?

    <p>Wave-like radiation and particle-like radiation</p> Signup and view all the answers

    What is the approximate speed of light?

    <p>3 × 10^8 m/s</p> Signup and view all the answers

    What is a historical account of animal behavior related to natural disasters?

    <p>The exodus of animals from the Greek city of Helice before an earthquake</p> Signup and view all the answers

    What is the year of the earliest recorded instance of animal behavior related to natural disasters?

    <p>373 B.C.</p> Signup and view all the answers

    Which of the following behaviors is NOT observed in animals before natural disasters?

    <p>Changing the color of their fur</p> Signup and view all the answers

    What is a common criticism of using animal behaviors as predictors of natural disasters?

    <p>Reports are often biased due to hindsight</p> Signup and view all the answers

    Which of the following is thought to be the reason why animals can detect natural disasters before humans?

    <p>They are more sensitive to changes in their environment</p> Signup and view all the answers

    Which of the following animals is NOT mentioned in the text as exhibiting unusual behavior before natural disasters?

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

    What is the proposed explanation for why elephants move to higher ground before tsunamis?

    <p>They are sensitive to vibrations on the Earth's surface</p> Signup and view all the answers

    Which of the following is an example of an animal behavior that is NOT unique to natural disasters?

    <p>Reacting to a warning shout</p> Signup and view all the answers

    What is the similarity between animal behaviors and human reactions to natural disasters?

    <p>Both are basic survival instincts</p> Signup and view all the answers

    What is thought to be the reason why rodents flee their burrows before earthquakes?

    <p>They are sensitive to subtle changes in the Earth's tilting</p> Signup and view all the answers

    What is the significance of Planck's constant in quantum mechanics?

    <p>It is a fundamental constant essential in calculating the energy of a photon</p> Signup and view all the answers

    What is the relationship between the energy of a photon and its frequency?

    <p>The energy of a photon is directly related to its frequency</p> Signup and view all the answers

    What is the reason behind the observed animal behavior before natural disasters?

    <p>Animals are sensitive to changes in their environment</p> Signup and view all the answers

    What is the concept exhibited by photons?

    <p>Wave-particle duality</p> Signup and view all the answers

    What can be calculated using the formula E = hf?

    <p>The energy of a photon</p> Signup and view all the answers

    What is the unit of Planck's constant?

    <p>Joule-seconds</p> Signup and view all the answers

    What is the significance of the historical account of animal behavior in 373 B.C.?

    <p>It is a record of unusual animal behavior before an earthquake</p> Signup and view all the answers

    What is the relationship between the energy of a photon and its wavelength?

    <p>The energy of a photon is inversely related to its wavelength</p> Signup and view all the answers

    What is the fundamental aspect of wave-particle duality exhibited by photons?

    <p>They exhibit both wave-like and particle-like properties simultaneously.</p> Signup and view all the answers

    Why is the energy of a photon directly related to its frequency?

    <p>Because the energy of a photon is directly related to Planck's constant.</p> Signup and view all the answers

    What is the significance of the historical account of animal behavior in 373 B.C.?

    <p>It is one of the earliest recorded instances of animal behavior related to natural disasters.</p> Signup and view all the answers

    What is the relationship between the energy of a photon and its wavelength?

    <p>The energy of a photon is inversely proportional to its wavelength.</p> Signup and view all the answers

    What is the unit of measurement for the energy of a photon?

    <p>Joules (J)</p> Signup and view all the answers

    What is the significance of Planck's constant in quantum mechanics?

    <p>It is a fundamental constant used to calculate the energy of a photon.</p> Signup and view all the answers

    What can be calculated using the formula E = hc/λ?

    <p>The energy of a photon</p> Signup and view all the answers

    What is the approximate value of Planck's constant?

    <p>6.63 × 10^-34 J·s</p> Signup and view all the answers

    What is the primary advantage of animals detecting natural disasters before humans?

    <p>Their ability to detect natural signals earlier than humans allows them to react sooner.</p> Signup and view all the answers

    Why do some researchers argue that animal behaviors are not reliable predictors of natural disasters?

    <p>Because animal behaviors are often reported only in hindsight, leading to potential bias.</p> Signup and view all the answers

    What do researchers suggest is the reason behind rodents' ability to flee their burrows before earthquakes?

    <p>Their sensitivity to subtle changes in the Earth's tilting.</p> Signup and view all the answers

    What is the similarity between animal behaviors and human reactions to natural disasters?

    <p>Both are examples of a basic survival instinct.</p> Signup and view all the answers

    What do scientists propose is the reason behind sharks' movement to deeper waters before hurricanes?

    <p>Their response to changes in air pressure preceding the hurricane.</p> Signup and view all the answers

    Why do researchers think that animals might be able to detect natural disasters before humans?

    <p>Because animals are more sensitive to natural signals than humans.</p> Signup and view all the answers

    What do reports of animal behaviors before natural disasters often lack?

    <p>Retroactive interpretation.</p> Signup and view all the answers

    What is a potential limitation of using animal behaviors as predictors of natural disasters?

    <p>Their behaviors are often reported only in hindsight.</p> Signup and view all the answers

    What do many researchers believe animals detect that allows them to react to natural disasters earlier than humans?

    <p>Early tremors of an earthquake</p> Signup and view all the answers

    Why do some researchers argue that animal behaviors are not reliable predictors of natural disasters?

    <p>Because animal behaviors are often noted only in hindsight</p> Signup and view all the answers

    What is thought to be the reason why animals can detect natural disasters before humans?

    <p>Because animals are able to detect certain natural signals earlier than humans</p> Signup and view all the answers

    What is a common limitation of using animal behaviors as predictors of natural disasters?

    <p>That animal behaviors are often noted only in hindsight</p> Signup and view all the answers

    What do scientists believe is the basic instinct behind animal behaviors before natural disasters?

    <p>A basic survival instinct</p> Signup and view all the answers

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