Why’d the Ocean Stop Getting Saltier?

Why’d the Ocean Stop Getting Saltier?

Assessment

Interactive Video

Science, Physics, Geography, Biology, Chemistry

11th Grade - University

Hard

Created by

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FREE Resource

The video explores why oceans are salty, explaining that rain erodes salts from rocks, which rivers carry to the sea. While rivers add salt, evaporation doesn't remove it, maintaining ocean salinity. Historical theories, like Edmond Halley's, miscalculated Earth's age based on salinity. Salinity is balanced by processes like evaporation and hydrothermal vents. Local salinity varies due to factors like rain and ice. Climate change affects salinity, with NASA's Aquarius satellite monitoring these changes to understand their impact on climate.

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7 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

How did Edmond Halley propose to calculate the age of the Earth using ocean salinity?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

What processes can remove salt from the oceans?

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the primary reason that the oceans do not get saltier over time despite rivers adding salt?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What role does evaporation play in the salinity of ocean water?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

How does salinity vary in different regions of the ocean?

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

What impact does climate change have on ocean salinity?

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7.

OPEN ENDED QUESTION

3 mins • 1 pt

Why is understanding salinity patterns important for climate science?

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