The World of Matter

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Questions and Answers

What is the general definition of matter in classical physics and general chemistry?

  • Anything that can be touched
  • Anything with rest mass and volume
  • Anything with mass
  • Anything with mass and volume (correct)

Dark matter is called 'dark' because it does not interact with which of the following?

  • Strong nuclear force
  • Weak nuclear force
  • Gravity
  • Electromagnetic field (correct)

What is the predominant type of matter in the universe?

  • Dark matter (correct)
  • Ordinary matter
  • Dark energy
  • Antimatter

Which theory suggests that more matter is present in the universe than can be seen?

<p>Dark matter theory (A)</p> Signup and view all the answers

What percentage of the mass-energy content of the universe is dark matter in the standard Lambda-CDM model of cosmology?

<p>26.8% (C)</p> Signup and view all the answers

What are some lines of evidence for the existence of dark matter?

<p>Gravitational lensing and cosmic microwave background (B)</p> Signup and view all the answers

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