QQuestionEarth Science
QuestionEarth Science
Why do clouds and precipitation contain freshwater even though much of the water vapor comes from oceans and seas?
A. The atmosphere filters out the salt as precipitation is created.
B. Most of the water doesn't come from the ocean; it comes from freshwater sources.
C. Precipitation does contain 72% saltwater.
D. When water evaporates from the ocean, the salt is too dense to evaporate.
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understanding Water Evaporation
When water evaporates from the ocean, only the water molecules ($$\mathrm{H}_2\mathrm{O}$$) transform into water vapor, leaving behind the dissolved salt.
Salt molecules are too large and heavy to become airborne during the evaporation process.
Step 3:: The Evaporation Process
During ocean water evaporation: - Only pure water molecules escape into the atmosphere - Salt molecules remain in the ocean water - This means the water vapor is 100% pure water, without salt
Step 4:: Cloud and Precipitation Formation
When water vapor rises and cools: - It condenses into water droplets - These droplets form clouds - Precipitation (rain, snow) is created from these pure water droplets - No salt is carried into the clouds or precipitation
Step 5:: Analyzing the Options
- Option A is correct: The atmosphere effectively "filters out" salt during the evaporation and condensation process - The salt is left behind in the ocean, ensuring freshwater in clouds and precipitation
Final Answer
The atmosphere filters out the salt as precipitation is created.
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