Question
Download Solution PDFThe average salinity of the oceans is _______ parts per thousand.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 35.
Key Points
- The average salinity of seawater is about 35 grams per kilogram (g/kg) of seawater, or 35 ppt.
- Seawater generally ranges from 33 ppt to 38 ppt. Freshwater lakes, rivers, and streams contain some dissolved matter—1 ppt or less.
- Brackish water is a mixture of fresh water and seawater, below approximately 33 ppt.
- Hypersaline water, or brine, is very salty seawater, above approximately 38 ppt.
Additional Information
- Salinity, which is measured in parts per thousand (ppt), is the amount of salt in grams per kilogram of saltwater.
- The number of parts, or grams, of salt there are per thousand parts, or kilogram (1,000 g), of seawater is known as parts per thousand.
- The term "parts per thousand" (ppt) is frequently used.
- Both temperature and salinity affect density.
- A hydrometer can be used to determine the density of a liquid by measuring the level at which the hydrometer floats in it.
Last updated on May 28, 2025
-> SSC MTS 2025 Notification will be released by the Staff Selection Commission (SSC) on the official website on 26th June, 2025.
-> The online application process will also begin once the official notification is out. The last date to apply online will be 25th July 2025 as per the SSC Exam Calendar 2025-26.
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