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Questions and Answers
What is the chemical signature of the salt compounds found in the streaks on Mars?
What is the chemical signature of the salt compounds found in the streaks on Mars?
- Sodium chloride
- Calcium sulfate (correct)
- Potassium nitrate
- Magnesium carbonate
What is the length of the streaks on Mars?
What is the length of the streaks on Mars?
- At least 200 feet long
- At least 300 feet long (correct)
- At least 400 feet long
- At least 500 feet long
What is the source of the water on Mars?
What is the source of the water on Mars?
- Melting ice
- Underground aquifer
- Water vapor from the thin Martian atmosphere
- All of the above (correct)
What is the significance of the discovery of flowing water on Mars?
What is the significance of the discovery of flowing water on Mars?
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What is the best way to determine whether there's life on Mars?
What is the best way to determine whether there's life on Mars?
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When do the streaks on Mars appear and fade?
When do the streaks on Mars appear and fade?
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What prevents the water in the streaks on Mars from freezing at extremely low temperatures?
What prevents the water in the streaks on Mars from freezing at extremely low temperatures?
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Study Notes
- NASA has evidence of flowing water on Mars, which appears as dark, narrow streaks on the surface of the planet.
- The streaks appear during the warmer months and fade the rest of the year.
- The streaks consist of wet soil and are at least 300 feet long.
- The chemical signature of salt compounds combined with water was detected.
- The salt compounds prevent water from freezing at extremely low temperatures.
- The 2015 finding could have major implications for the possibility of microscopic life forms on Mars.
- The only way to determine whether there's life on Mars is to collect rocks and soil from the planet for analysis on Earth.
- Liquid water could potentially be used for drinking and for creating oxygen and rocket fuel.
- The source of the water remains a mystery, but it could be melting ice, an underground aquifer, water vapor from the thin Martian atmosphere, or some combination of these.
- Scientists will continue to study the Red Planet to answer questions about its potential for life and the origin of liquid water.
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