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Home Q & A Board Biology-Related Homework Help Environmental and Conservation Biology
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raffat naseem raffat naseem
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6 years ago
What geologic era are we in today?
 
  A) Cenozoic
  B) Mesozoic
  C) Paleozoic
  D) Precambrian


Q. 2 - What is the name of the theory that describes the formation of the universe?
 
  A) Theory of Gravitational Attraction
  B) Big Bang Theory
  C) Theory of Continental Drift
  D) Solar Nebula Theory


Q. 3 - A(n) ________ is defined as a cataclysmic, explosive death of a star.
 
  A) supernova
  B) accretion
  C) planetesimal
  D) condensation


Q. 4 - Which of the following elements would have been the first to form after the formation of the universe?
 
  A) Lithium and carbon
  B) Helium and phosphorous
  C) Hydrogen and helium
  D) Iron and magnesium


Q. 5 - When did the Big Bang occur?
 
  A) 3.8 billion years ago
  B) 4.6 billion years ago
  C) 7.8 billion years ago
  D) 13.7 billion years ago


Q. 6 - Match the layer of the atmosphere with the correct description.
 
  A) The layer of the atmosphere with the greatest amount of air molecules. Temperatures decrease from bottom to top
  B) The second layer of the atmosphere where temperatures gradually increase from bottom to top
  C) The third layer of the atmosphere where the coldest temperatures are found
  D) The outermost layer of the atmosphere where temperatures are extremely high due to solar radiation
 
  1) Stratosphere
  2) Troposphere
  3) Mesosphere
  4) Thermosphere
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xstealthx08xstealthx08
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6 years ago
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raffat naseem Author
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6 years ago
This helped my grade so much Perfect
djeghri
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Yesterday
Thanks
hannahspillett
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2 hours ago
this is exactly what I needed
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