Intro to Marine & Properties of Ocean Water Quiz

The instrument shown here is called a refractometer. You would use this to determine:

• The temperature of a water sample

• The turbidity of a water sample

• The salinity of a water sample

• The nutrient levels of a water sample

The deep ocean has a constant temperature of around ___.

• 0°C

• 2°C

• 10°C

The waters around the Bahamas have very clear water (and also swimming pigs!). Which is true?

• the water has high levels of phytoplankton and bacteria

• the water has low levels of phytoplankton and bacteria

Tags

NGSS.MS-LS2-1

The thermocline is ___.

• an ocean layer where rapid change in temperature occurs

• an ocean layer where rapid change in salinity occurs

• an ocean layer where rapid change in density occurs

Tags

NGSS.MS-ESS2-6

The water of the Amazon River has a ___.

• low turbidity

• high turbidity

A water molecule is held together by ___.

• 1 hydrogen bond

• 2 hydrogen bonds

• 1 covalent bond

• 2 covalent bonds

Why does ice float?

• As water freezes, it expands and its density decreases.

• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Tags

NGSS.MS-PS1-4

Water freezes at 0°C. However, saltwater has a slightly lower freezing point of around -1.8°C. In Fahrenheit, how many degrees lower is the saltwater freezing point than the freshwater freezing point?

• approximately 1 degree lower

• approximately 3 degrees lower

• approximately 5 degrees lower

Which of the following would INCREASE salinity in a location?

• runoff from land

• ice melting

• heavy rainfall

• evaporation

Water is the only substance that naturally exists in all three phases on Earth: gas, liquid, and solid.

• True

• False

Tags

NGSS.MS-ESS2-4