Question

An instrument is gradually lowered beneath the surface of the ocean to measure the temperature and salinity of the water. The graphs below show the change in temperature at each depth in kilometers below the surface.
What is the most valid conclusion regarding ocean depth temperature, based on the data?

The temperature and salinity increase with increasing depth.
The salinity increases as you get deeper into the ocean.
The bottom of the ocean is frozen and salinity levels are low.
The ocean temperature never rises above 10°C and salinity remains constant.

Answer 1

The conclusion from the data is that the salinity increases as you get deeper into the ocean.

What is salinity?

Salinity means the level of salt in water. The salinity of water tends to increase as the depth of water increases. This means that the water becomes saltier as it gets deeper. Similarly, the temperature decreases with increasing depth.

Hence, the conclusion from the data is that the salinity increases as you get deeper into the ocean.

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