Oceans Importance

Which will most likely result if there us increased upwelling in a coastal area?

• more aquatic Life

• less nutrients in the water

• higher water temperatures

• fewer nitrates

Which technology is most efficient in mapping large areas of the ocean floor?

• SONAR

• robots

• depth gauge

• satellite imaging

Which best describes the shallow water ocean zone?

• The long water column protects small organisms from being eaten by large predators.

• Cooler water temperatures cause a decrease in dissolved oxygen needed by organisms.

• Sunlight penetration increases algae growth and provides food for a variety of organisms

• Hydrothermal vents provide heat and dissolved minerals needed by some organisms to survive.

Why are upwellings in the ocean essential for some organisms to survive?

• because many animals need low-tide conditions each da

• because currents carry predators away from the surface

• because the warm water kills bacteria before it can harm plankton

• because needed nutrients and dissolved gases are brought into new area

Which best describes the source of oxygen in ocean water?

• Oxygen is produced by marine plants in the process of making food.

• Oxygen is produced through the exhalations of marine animals

• Oxygen is produced through precipitation falling on the ocean

• Oxygen is produced by nodules on the ocean floor.

Which best describes the most abundant form of ocean life?

• fish

• algae

• microbes

Which causes cold ocean water to rise during an upwelling event?

• motion of organisms

• deep water currents

• mass of nutrients

• surface winds

Why are estuaries often valued as the center of human coastal communities?

• Estuaries create mild habitats for deep sea life

• Estuaries enhance marine biology resources for the future.

• Estuaries are needed to filter pollution out of ocean water.

• Estuaries provide a place for people to live, fish, and swim.

Which evidence best supports that there are a variety of nutrients in Earth’s oceans?

• Coral can be found in warm waters.

• Freshwater rivers drain into Earth’s oceans

• Some marine organisms migrate with the seasons

• A wide range of organisms is sustained in Earth’s oceans.

Which dissolved gases are most needed by plants and animals living in the ocean?

• nitrogen and oxygen

• oxygen and carbon dioxide

• carbon dioxide and nitrogen

• carbon monoxide and nitrogen