Ecosystems Review

A. Estuaries have only freshwater and lakes have only have salt water.

B. Estuaries have only salt water and lakes have only have freshwater.

C. Lakes are almost always salt water and estuaries are brackish water.

D. Lakes are almost always freshwater and estuaries are brackish water.

A. a lake

B. a prairie

C. a coastline

D. the mountains

A. contains only salt water

B. contains only freshwater

C. supports little to no animal life

D. affected by the rise and fall of tides

A. Ponds flow into the ocean and estuaries do not.

B. Ponds are affected by tides and estuaries are not.

C. Ponds are freshwater and estuaries are brackish water.

D. Ponds have salt water and estuaries have brackish water.

A. They minimize damage to oceans during hurricanes.

B. They filter salt out of river water before it enters the oceans.

C. They provide safe, nutrient-rich breeding areas for ocean organisms.

D. They increase the amount of sediment able to settle on the ocean floor.

A. an ocean ecosystem is brackish water; a lake ecosystem is freshwater

B. an ocean ecosystem is salt water; a lake ecosystem is brackish water

C. an ocean ecosystem is salt water; a lake ecosystem is freshwater

D. an ocean ecosystem is freshwater; a lake ecosystem is salt water

A. deer, brown bears, and rabbits

B. pelicans, sea lions, and seaweed

C. monkeys, palm trees, and snakes

D. oak trees, squirrels, and opossums

A. lakes and ponds

B. oceans and ponds

C. estuaries and lakes

D. oceans and estuaries

A. Ponds are usually larger and deeper than lakes.

B. Lakes are usually larger and deeper than ponds.

C. Ponds usually contain salt water, while lakes contain freshwater.

D. Lakes usually have the same temperature from top to bottom, while

ponds do not.

A. ponds and lakes

B. estuaries and forests

C. grasslands and oceans

D. salt marshes and deserts

A. estuary

B. forest

C. grassland

D. lake

A. Oceans provide water for plants trying to survive in deserts.

B. Estuaries provide a safe breeding area for ocean organisms.

C. Grasslands provide food for organisms living in oceans.

D. Forests provide a hiding place from fires in grasslands.

A. Salt marshes have deeper water than oceans.

B. Salt marshes have shallower water than oceans.

C. Salt marshes have more organisms than oceans.

D. Salt marshes have more wave action than oceans.

A. The amount of trees in a grassland is greater than in a forest.

B. The amount of trees in a forest is greater than in a grassland.

C. The amount of salt water in a grassland is greater than in a forest.

D. The amount of salt water in a forest is greater than in a grassland.

A. forest and ocean

B. ocean and estuary

C. grassland and forest

D. estuary and grassland