Ecosystems Quiz

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Questions and Answers

What are the components that make up an ecosystem?

  • Only energy flows
  • Only physical environment
  • Both living organisms and physical environment (correct)
  • Only living organisms

How is energy incorporated into plant tissue in an ecosystem?

  • Through photosynthesis (correct)
  • Through nutrient cycles
  • Through decomposition of dead organic matter
  • Through climate factors

What role do animals play in the movement of matter and energy in an ecosystem?

  • They play an important role in the movement of matter and energy (correct)
  • They only consume plant tissue
  • They have no role in matter and energy movement
  • They only influence the quantity of plant biomass

How do decomposers facilitate nutrient cycling in an ecosystem?

<p>By converting nutrients to a form readily used by plants and microbes (B)</p> Signup and view all the answers

What controls the overall structure of an ecosystem?

<p>Both internal and external factors (C)</p> Signup and view all the answers

What is the electrical conductivity of a semiconductor in comparison to a conductor and an insulator?

<p>Between that of a conductor and an insulator (B)</p> Signup and view all the answers

How does the resistivity of a semiconductor change with temperature?

<p>Falls as its temperature rises (D)</p> Signup and view all the answers

What alters the conducting properties of a semiconductor?

<p>Introducing impurities into the crystal structure (B)</p> Signup and view all the answers

What is created when two differently doped regions exist in the same crystal of a semiconductor?

<p>A semiconductor junction (D)</p> Signup and view all the answers

Which of the following is an example of a semiconductor?

<p>Gallium arsenide (A)</p> Signup and view all the answers

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