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7th Grade Salinity Quizzes, Questions & Answers

7th Grade

Top Trending Salinity Quizzes

Ocean Salinity Quiz: The 3.5% Rule Explained

This assessment explores the concept of ocean salinity, focusing on the 3.5% rule. It evaluates understanding of salinity's role in marine ecosystems and its implications for ocean circulation. This knowledge is essential for...

Questions: 15 | Attempts: 10 | Last updated: Mar 20, 2026

Sample Question 1
What does the term salinity mean when describing ocean water?

The temperature of ocean water measured in degrees

The total amount of dissolved salts in a given amount of water

The depth at which ocean water becomes too salty to support life

The color change in ocean water caused by mineral content

Sample Question 2
The average salinity of ocean water worldwide is approximately 3.5 percent, meaning about 35 grams of salt are dissolved in every kilogram of seawater.

True

False

Sample Question 3
Which dissolved salt makes up the largest proportion of the total salts found in seawater?

Magnesium sulfate

Calcium carbonate

Sodium chloride

Potassium bromide

7th Grade Salinity Quizzes, Questions & Answers

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