These two food chains often work together. One means land organism and the other means water organism.
What are terrestrial and aquatic?
100
This organism plays a main role in the aquatic food chain but it cannot live on the ocean floor because the sun would not be able to reach it.
What is algae?
100
When scientists say water is a polar molecule they mean this.
What is positivily charged on one end and negativly charged on the other?
100
These are the 2 main kinds of pollution. One that can be directly identified and the other that comes from a number of sources.
What are point-source and non-point-source pollution?
100
Low temperature, high dissolved oxygen, and a neutral pH are all indicators of this kind of water system.
What is a healthy water system?
200
In a marine food web algae gets its energy directly from this.
What is the Sun?
200
An important gas that is dissolved in the ocean water that helps many organisms respirate.
What is Oxygen?
200
Water has the density of 1 only things with a density of this can float on water.
What is less than 1?
200
This kind of pollution includes run-off of fertilizers and pesticides, and storm water run-off.
What is non-point-source pollution?
200
This can occur after a lot of heavy rain. It does not allow the sunlight to penetrate the water and can cause a decrease in oxygen levels in the water.
What is a high turbidity?
300
These are the organisms at the bottom of all food chains that provide the initial energy for the entire chain.
What is a producer?
300
This is the process that is responsible for increasing dissolved oxygen levels in the ocean.
What is Photosynthesis?
300
Water has a high one of these. This allows water to heat up and cool off more slowly than other substances.
What is specific heat?
300
This kind of pollution comes from one specific source. An example of this is a sewer pipe flowing directly into a river.
What is point-source pollution?
300
Water temperature is important to the health of a water system because cold water can hold more of this substance that fish need to live.
What is dissolved oxygen?
400
This is an example of an interrelationship between the the aquatic and terrestrial food web in the artic.
What is a polar bear eating a fish?
400
The process of nutrient rich cool water from the deep ocean rising to the surface.
What is upwelling?
400
Water has two very special characteristics that allow it to stick to itself and other things with strong bonds.
What are cohesion and adhesion?
400
Because of this it is very important that scientists monitor the Neuse River in North Carolina.
What is agricultrual run-off from farms?
400
A scientist would measure this if he were concerned about the effects of acid rain on a water system.
What is the pH level?
500
Insects are eaten by frogs, frogs ar eaten by fish, and fish are eaten by bears is an example of the overlap between these two food chains.
What is the aquatic and terrestrial food webs?
500
These two factors can affect the oceans water temperatures.
What are depth and distance from land?
500
This property of water allow small water bugs to seem to skate on top of water.
What is surface tension?
500
This would be an example of point-source water pollution in the ocean.
What is an oil spill from a tanker?
500
The hydrosphere consists of all the water on the earth including what is in the atmosphere. Of all the water on earth this percentage is saltwater and only this percent is avaliable for drinking.
What is 97% salt water and only 1% is avaliable for drinking?