ReadWorks_Sea Water - Post Reading Questions

What is one thing that just about everyone knows about the ocean?

• The ocean is cold

• The ocean is salty

• the ocean is dense

• the ocean is icy

The text describes sea water salinity in different places. Where has lower surface salinity?

• the Atlantic ocean

• The ocean is near the equator and the poles

• the Red Sea

• in the Persian Gulf region

The salinity, temperature, and density of sea water are connected. What evidence from the text supports this conclusion?

• "On average, there is a distinct decrease of salinity near the equator and at both poles, although for different reasons."

• "The amount of salt in sea water also determines the temperature at which sea water freezes."

• "The temperature and salinity of the sea water also help determine its density."

• "The surface salinity is lower in the polar regions than in the tropical regions due to melting each summer."

Read these sentences from the text.

Near the equator, the tropics receive the most rain on a consistent basis. As a result, the fresh water falling into the ocean helps decrease the salinity of the surface water in that region.

[. . .]

. . . as the salt content of sea water increases, so does its density. What can you infer about how rain affects the density of surface water near the equator?

• Rain near the equator helps decrease the density of surface water there.

• Rain near the equator helps increase the density of surface water there.

• Rain near the equator does not help affect the density of surface water there.

• Rain near the equator helps to remove the density of surface water there.

Tags

NGSS.MS-ESS2-4

What is the main idea of this text?

• Sea water is salty, with different salinity, temperature, and density in different places, sea depths, and forms of water.

• Sea water near the equator and poles have lower surface salinity because of the addition of fresh water from rain or melting ice.

• Sea water density increases when sea water temperature decreases or when sea water salinity increases.

• Water expands as it changes from liquid to ice, which decreases its density, and this is why ice floats.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

According to the text, water has what unique property?

• as the temperature of water increases, the density of water increases

• as the temperature of water decreases, the density of water increases

• as the temperature of water decreases, the density of water decreases

• water is a universal solvent.

Tags

NGSS.MS-PS1-4

According to the text, as the salt content of the water ____________, the density of the water ___________________.

• increases, increases

• decreases, decreases

• increases, decreases

• decreases, increases