Exam 4: Ecosystems: What Are They, and How Do They Work

What refers to the zones that comprise a mature soil? 

Which soil horizon refers the surface leaf litter layer? 

What has the most influence on soil porosity? 

EARTH LAYERS -Which letter in the diagram corresponds to the layer that contains non-renewable fossil fuels and minerals?

ECO GRAPH -In the graph,which ecosystems have the greatest net primary productivity?

In which of the following does the conversion of solar energy into chemical energy occur? 

Which type of satellite is used in remote sensing? 

What is an organism that feeds on both plants and animals called? 

The amount of food available in their habitat can be a(n)______________________________ for the population size of rats.

Which pyramid best explains why there are typically only four to five links in a food chain? 

What is associated with the presence of red and yellow in a soil horizon? 

HEAT -Which letter in the diagram is the level that is the source of all food in an ecosystem?

Which of the following correctly describes humus? 

The percent of usable energy transferred as biomass from one trophic level to the next is called ___________________________________.

FOOD WEB -What is depicted in the image?

Where would a submarine most likely be used as an exploration tool? 

If an ecosystem had an ecological efficiency of 10%,how much energy would be available to the third trophic level if the first trophic level consisted of 10 000 units of energy?

The place or environment where a population normally lives is its habitat.

What is the approximate number of species that biologists have identified and named? 

Which element is involved in major biogeochemical cycles?