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 (B)</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 (B)</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 (C)</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 (C)</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 (B)</p> Signup and view all the answers

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

<p>Photons (B)</p> Signup and view all the answers

What is the value of Planck's constant?

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

What type of radiation do photons exhibit?

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

What is the approximate speed of light?

<p>3 × 10^8 m/s (A)</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 (C)</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. (D)</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 (C)</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 (C)</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 (D)</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 (D)</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 (C)</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 (C)</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 (A)</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 (C)</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 (C)</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 (D)</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 (B)</p> Signup and view all the answers

What is the concept exhibited by photons?

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

What can be calculated using the formula E = hf?

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

What is the unit of Planck's constant?

<p>Joule-seconds (A)</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 (A)</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 (C)</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. (D)</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. (C)</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. (A)</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. (C)</p> Signup and view all the answers

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

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

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

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

What is the approximate value of Planck's constant?

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

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

<p>Retroactive interpretation. (D)</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. (B)</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 (C)</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 (A)</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 (C)</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 (C)</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 (C)</p> Signup and view all the answers

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