MP3 Assessment Recovery

What two elements make up salt water?

• Sodium Chloride

• Sodium Salt

• Salt Chloride

• Potassium Chloride

The measurement of salinity is

• the amount of salt in the water.

• the amount of chloride in the water.

• the amount of potassium in the water.

• the amount of nutrients in the water.

What makes the surface of the ocean a different temperature from the rest?

• global warming

• the sun

• human activities

• glaciers melting

 As the temperature of ocean water changes from 10 to 30 degrees C, how does the density change?

• The water becomes more dense
• The water becomes less dense
•  The density does not change 
•  It is impossible to predict

 The density of ocean water is influenced by what two factors?

•  Salinity and temperature
• Water color and chlorophyll
•  Dissolved gases and dissolved solids
•  Dissolved carbon and trace elements

 What is true about the water on the bottom of the ocean?

•  It is the saltiest water found in the ocean
• It is the densest water found in the ocean
•  It is not frozen because sunlight warms it up
•  It does not move

 How do conditions change as the depth of the ocean water increases?

• temperature decreases and pressure increases
• temperature increases and pressure increases
• temperature decreases and pressure decreases
• temperature increases and pressure decreases

Why are people not able to scuba dive to the deepest parts of the ocean?

• As you go deeper into the ocean, temperature decreases and pressure increases too much for a body to withstand.
• As you go deeper into the ocean, temperature and pressure increase too much for a body to withstand.
• As you go deeper into the ocean, temperature and pressure decrease too much for a body to withstand.
• As you go deeper into the ocean, temperature increases and pressure increases too much for a body to withstand.

If I have freshwater that is less dense, what will it do in comparison to salt water that is more dense?

• The more dense water will float and the less dense water will sink.
• The more dense water will sink and the less dense water will float
• Nothing they will mix evenly.

As we go deeper into the ocean, salinity ___________. 

• Doubles
• Decreases 
• Increases
• Remains the same