End of the line, Pt 2 - Movie -

BIG QUESTION: Why should we humans be concerned about overfishing?
Because we're unbalancing marine life.

1. What are the "Big Five" fish we eat all the time?


Atlantic Salmon (organic farmed)
Atlantic Halibut (onshore farmed)
Coley or Saithe (NE Arctic)
Dab (otter trawl or seine net)
Herring (MSC certified)
Mussel
Pouting or Bib


2. What is a reason for not eating sharks or other deep water fish?


They may also be recovering from previous
over exploitation, species with relatively low resilience to
modern fishing methods, or fish from farming systems
that need to improve some of their practices.


3. What are some "fish to eat" occasionally and "fish to avoid"?

Fish to eat:


Alaska or Walleye Pollock
Anchovy
Arctic char
Bream
Gilthead


Fish to eat only occasionally:


Flounder
Grey mullet
Gurnard
Haddock
Hake
Halibut
Herring or Sild
Mackerel
Marlin
Monkfish (Anglerfish)


Fish to avoid:


Prawn (King and Tiger)
Red Mullet
Salmon
Sardine or Pilchard
Scampi or Langoustine
Seabass
Shark & Dogfish (rock salmon)
Skate and Rays
Sole (Dover/Common)

Animal Habitat Structure.

1. How does eelgrass density influence abundance of species in an ecosystem?



Eel grass is an important habitat and today eel grass its habitat and beds for a lot animals. they act as a nursery, habitat and feeding ground for many fish, waterfowl and invertebrates.

2. Find web sites to support your hypothesis, and include wed site addresses.
buzzarasbay.org/eelgrass.html

Animal Habitats of San Diego Bay

1. San Diego is... (location, size, fact)
 -San diego is located on the coast of the pacific ocean in southern california. With a population of 1,326,179 and is the 8th largest city in the united states

2. What type of activities occur on the bay?
-There is navy ships and ship ports

3. How and where on the bay is salt made?
-Salt is made through evaporation and on the edge of chula vista.

4. Where is the SD national wild life refuge complex located?
-In South San Diego in the largest mud flats.

Thermal Characteristics Of Water

Thermal Characteristics Of Water

1. Are heat and temperature same or different?
They are different. Temperature is the measurement of kinetic energy. Heat is total energy

2. What is the heat capacity?

The number of heat units needed to raise the temperature of a body by one degree.

3. How is the capacity of water unique?
It is like a sponge. It is how much heat an object can absorb before it increases in temperature.

4. How does water temperature affect its density?
The warmer the water the less dense. The cooler the denser.

Energy Flows Though Ecosystems.

Energy Flows Though Ecosystems.

1. Examples of primary producers are, and how to they get their energy?

Plants, algae, and some bacteria use solar energy to produce organic plant material through photosynthesis. 

2. The second trophic level is made up of what creatures, and from where do they get their energy?

Herbivores—animals that feed solely on plants—make up the second trophic level. 

3. Why do predators make up the third trophic level?

Because predators eat herbivores and they comprise the third trophic level.

Surface Water and Global Temperatures

Surface Water and Global Temperatures

1- Thermal Inertia: San Francisco and NorfolK, Virginia area are the same Latitude, Why would you NV compare to SF, have warmer summers and cooler winters?

About half of this light reaches the surface, where it is converted to heat, then transferred into the atmosphere by conduction, radiation, and evaporation. the atmosphere, like the land and ocean, eventually radiates the heat back into space in the form of long wave (infrared ) radiation.




2- Describe the different ways temperatures are "moderated" on Earth without moderate temperatures, Earth could not support life as we know it.

Water takes much longer than air to heat up and also longer to cool because it has much higher specific heat. thus, on hot days, water (oceans, lakes and rivers) absorb heat, keeping the air something cooler. when the air gets cool, however water slowly releases heat to the atmosphere raising air temperatures. this is why temperatures along coast lines are cooler in summer and warmer in winter relative to inland areas. temperature varies.

The Chemistry of Water.

1. Describe how water molecules are bonded.

 In water, each hydrogen nucleus is bound to the central oxygen atom by a pair of electrons that are shared between them; chemists call this shared electron pair a covalent chemical bond. 







2. Describe how the positive and negative charges of water are distributed.

The H2O molecule is electrically neutral but the positive and negative chargers are not distributed uniformly. the electronic (negative) charge is concentrated at the oxygen end of the molecule.

3. Describe the chemistry of water that allows an insect to walk on water.

The water strider takes advantage of the fact that the water surface acts like an elastic film that resists deformation when a small weight is place on it.

 

4. What is unique about water and its density?

The distinction between molecules located at the surface and those deep inside is especially prominent  H2O owning to the strong hydrogen-bonding forces.