The part of the coastline between the high tide mark and the low tide mark is called the
The main type of wetland that occurs closer to the equator is
What do rivers drop in the salt marshes along the edges of estuaries?
What is an example of a pollutant that may be carried by rivers to estuaries?
A habitat is an environment that
Over much of the continental shelf, sunlight penetrates to the ocean bottom.
Corals get their nutrition by performing photosynthesis.
Coral reefs exist in deep, dark waters near a coastline.
Phytoplankton are photosynthetic organisms that use air bubbles to stay near the surface.
Hydrothermal vents are deep ocean environments that are unable to support life.
Which of the following is a negative effect of commercial fishing?
Humans use the ocean's living resources as a source of
Which of these groups contains only nonliving ocean resources?
Most of the oil that enters the ocean comes from
Which of these materials are NOT presently mined from the ocean floor?
Freshwater from rivers mixes with the ocean's salt water in
What is a wetland?
One way that governments protect organisms in coastal areas is by passing laws that
Which of these describes the waters in many of near-shore environments?