Running Water on Mars TOEFL Reading

Multiple Choice

The word ‘’ merge’’  in the passage is closest in meaning to

• Expand

•  Separate

•  Straighten out

•  Combine 

Multiple Choice

The word ‘’ relics’’  in the passage is closest in meaning to

Remains

 Sites

 Requirements

 Sources

• Remains

•  Sites

• Requirements

•  Sources

Multiple Choice

In paragraph 2, why does the author include the information that 105 tons of water flow through the Amazon River per second? 

• To emphasize the great size of the volume of water that seems to flow through Mars's outflow channels

• To indicate dare to used by scientists to estimate how long ago Mars’ outflow channels were formed 

• To argue that flash floods on Mars may have been powerful enough to cause tear-shaped Islands to form 

• To argue that the force of flood waters on Mars was powerful enough to shape the northern volcanic plains

Multiple Choice

According to paragraph 2, all of the following are true of the outflow channels on Mars EXCEPT:

 

 

• They formed at around the same time that volcanic activity was occurring on the Northern plains

•  They are found only on certain parts of the Martian surface

• They are sometimes empty on to what appear to have once been the wet Sands of tidal beaches

• They are thought to have carried water Northwood from the equatorial regions 

Multiple Choice

All of the following questions are about geological features on Mars are answered in paragraph 3 EXCEPT: 

• What are some regions of Mars that may have once been covered with an ocean?

•  Where do Mission scientists believe that the river forming the delta emptied?

• Approximately how many craters on Mars do Mission scientists believe me once have been lakes filled with water?

•  During what period of Mars is history do some scientists think it may have had large bodies of water?

  
  

Multiple Choice

According to paragraph 3, images of Mars's surface have been interpreted as support for the idea that

•   the polar regions of Mars were once more extensive than they are now

•  a large part of the northern lowlands may have once been underwater

•  Deltas were once a common feature of the Martian  landscape

•  the shape of the Hellis Basin in has changed considerably over time 

Multiple Choice

What can be inferred from paragraph 3 about liquid water on Mars? 

• Lakes on early Mars were likely as large as some oceans on Earth's surface today

• 
  

  If there is any liquid  water at all on Mars's surface today, it's quantity is much smaller than the amount that likely existed in the past 

  
  
  

• Small scale goal is on Mars provide convincing evidence that liquid water existed on Mars in the recent past 

• 
  

  The small amount of water vapor in the Martian atmosphere suggest that there has never been liquid water on Mars 

Multiple Choice

According to paragraph 4, what do the 2003 Global surveyor data suggest about Mars? 

• 
  

  ancient oceans of Mars contained only small amounts of carbon

   the climate of Mars may not have been suitable for the formation of large bodies of water

• the climate of Mars may not have been suitable for the formation of large bodies of water

• Liquid water may have existed on some parts of Mars's surface for long periods of time

•  the ancient oceans that were formed on Mars dried up during periods of cold dry weather 

Multiple Choice

Question 9

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Drag and Drop

Question 10​

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