Nature of Water

Salinity

100

Salinity is the amount of ________ in sea water.

Salt

200

Which water is more dense: Freshwater or Saltwater?

Saltwater

300

Order the following water from top of the ocean to bottom of the ocean based on salinity.

34ppt, 21ppt, 45ppt, 15ppt

15ppt

21ppt

34ppt

45ppt

400

What is the phenomenon that is caused by a rapid change in salt and can be visible?

Halocline

500

Why does an area like Long Island Sound have a lower salinity than the open ocean?

The river with freshwater mixes with it.

Temperature

100

When temperature gets too high what can happen to corals?

They can bleach

200

What is coral bleaching?

When corals become too stressed they spit out the algae living inside of them.

300

Corals and Zooxanthellae have a __________ relationship. Meaning they both benefit.

Mutualistic

400

What do corals get from zooxanthellae? 

AND

What do zooxanthellae get from corals?

energy / nutrients

AND

Protection

500

What are the outcomes of Coral Bleaching?

The corals can die OR they can become healthy again when the conditions get better.

Osmoregulation

100

What is osmoregulation?

A fish balancing or regulating the water and salts in their body.

200

What organs are involved in osmoregulation?

Gills

Kidneys

Skin

300

When a fish has a higher salt content than the environment it is in a ___________ state.

When a fish has a lower salt content than the environment it is in a ___________ state.

When a fish has an equal salt content to the environment it is in a ___________ state.

Hypotonic

Hypertonic

Isotonic

400

What kind of cell in the gills are specialized to help get rid of salt?

Chloride Cells

500

What is the difference between the urine of freshwater fish and saltwater fish?

Freshwater fish urine has a low salt content with a lot of water while saltwater fish urine has a high salt content with very little water.