1. Marine Biology Definition: Why study? Includes: Geology
the study of organisms that live in the sea (this includes all water that has some degree of salinity).
provide clue about early life on earth
Many products come from the sea
support recreation and tourism worldwide
Marine organisms produce oxygen
Oceans help to regulate climate
Marine organisms can cause problems directly to human life or their property
Marine Biology
Geology
Chemistry (organic and inorganic)
Physics
Meteorology
Zoology
Includes:

2. Arctic Ocean
North Sea
Baltic Sea
Okhotsk Sea
Bering Sea
Black Sea
Med. Sea
Sea of Japan
Atlantic Ocean
Pacific Ocean
Gulf of Mexico
Red Sea
Arabian Sea
Bay of Bengal
China Sea
Gulf of California
Indian Ocean
Coral Sea
Ross Sea
Weddell Sea

3. What is the importance of water?

4. Importance of Water Hydrogen HOGS electrons
Attraction of one water molecule to another is known as hydrogen bonding

5. Three States of Water Solid Liquid Gas
Ice is caused by subjecting water molecules to low temperatures.
Liquid
Hydrogen bonds help keep water molecules as a cohesive group at most temperatures
Gas
Water vapor (the amount of water vapor in the air is humidity).

6. Water Properties 1- Surface Tension 2- Latent heat of melting
“skin” on surface
Allows objects to float = cohesion
2- Latent heat of melting
Ice melts at relatively high temperatures
Absorbs a great deal of heat as it melts

7. 3- Latent heat of evaporization
More water than gas
Water has the highest heat of evaporation of any naturally occurring substance.
4- Heat capacity
Strong buffer against rising/falling temps
Air temp fluctuates more than water
5- Transparency
sunlight shining on the surface can penetrate the surface

8. 6- Density 7- Dissolving ability
Cold water is more dense than warm water
Cold water sinks underneath warm water.
Colder water holds more oxygen than warmer water.
7- Dissolving ability
Universal solvent
Solute vs Solvent
Salinity

9. Salinity Dissolved salts in water; parts per thousand (ppt).
Average ocean is 35ppt
Brackish <25ppt
Hypersaline >40ppt
Salinity may vary
Constituents are always the same proportions. 1 1 1 1 1

10. The Composition of Seawater at 35 ppt Salinity

12. Pressure Greater the deeper the depth. Water at the bottom
has the weight of
the water above it
pushing down on it

13. Assignment
Draw a picture to represent each of the 7 unique properties of water