6.1- Water of the Seas

About how much of the earth's surface is covered with water?

• 30%

• 50%

• 70%

• 90%

Tags

NGSS.MS-ESS2-4

A chemist is studying the composition of a sample of ocean water. He gently heats the sample to evaporate the water, leaving him with the solid substances that had been dissolved in the sample. Next, he performs a series of procedures to separate the solid substances from each other. Finally, he measures how much of each solid he has obtained. What substance would he probably have the most of?

• sodium chloride

• magnesium sulfate

• calcium acetate

• potassium nitrate

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What is the outermost edge of a glacier floating on the ocean?

• sea ice

• ice cap

• ice shelf

• iceberg

What is a huge chunk of floating glacier ice?

• sea ice

• ice cap

• ice shelf

• iceberg

What causes the ocean to be blue?

• dissolved solids

• sky reflection

• water's natural color

• plankton

The amount of dissolved solids in seawater is seawater's ​ (a)  

• salinity.
• temperatures

Two main factors that affect the density of seawater are the amount of dissolved solids and the ​ (a)  

• temperatures.
• kilopascal

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The metric unit scientists usually use to measure ocean water pressure is the ​ (a)  

• kilopascal.
• thermocline

The underwater boundary where cold, deep water meets sun-warmed surface water is the ​ (a)  

• thermocline.
• oceanography

The study of the earth's ocean is ​ (a)  

• oceanography.
• salinity

Tags

NGSS.MS-ESS2-6