You are looking at a terrarium. That's a mini ecosystem inside a glass container. The terrarium is filled with soil, small rocks, and small plants. Yet, not only healthy plants are
inside. There are a few brown and decaying plants, too. You see that one part of the
glass is foggy.
Explain what evidence you see of the cycling of matter inside the terrarium. Think about
the water cycle that you observe at work inside the terrarium. Think about the carbon
and nitrogen cycles, too.
3

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required