Ecosystems Review

Ecosystems Review

Multiple Choice

How are lake ecosystems different from estuary ecosystems?

• 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.

Multiple Choice

Which area is most likely closest to a salt marsh or an estuary?

• A. a lake

• B. a prairie

• C. a coastline

• D. the mountains

Multiple Choice

Which is a characteristic common to oceans and estuaries?

• 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

Multiple Choice

Which best describes a difference between estuaries and ponds?

• 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.

Multiple Choice

Why are salt marshes and estuaries important for ocean life?

• 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.

Multiple Choice

Which best describes the differences between an ocean and a lake ecosystem?

• 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

Multiple Choice

Which organisms are most likely found in grasslands and deciduous forests?

• A. deer, brown bears, and rabbits

• B. pelicans, sea lions, and seaweed

• C. monkeys, palm trees, and snakes

• D. oak trees, squirrels, and opossums

Multiple Choice

Which two ecosystems contain saltwater organisms?

• A. lakes and ponds

• B. oceans and ponds

• C. estuaries and lakes

• D. oceans and estuaries

Multiple Choice

Which correctly compares lakes and ponds?

• 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.

Multiple Choice

Which two ecosystems provide most of the food for the world’s population?

• A. ponds and lakes

• B. estuaries and forests

• C. grasslands and oceans

• D. salt marshes and deserts

Multiple Choice

Which ecosystem would most likely be home to crabs and oysters?

• A. estuary

• B. forest

• C. grassland

• D. lake

Multiple Choice

Which best explains how two ecosystems benefit each other?

• 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.

Multiple Choice

How are oceans and salt marshes different?

• 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.

Multiple Choice

Which is a main difference between a grassland and a forest ecosystem?

• 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.

Multiple Choice

In which two ecosystems would you find rattlesnakes, deer, and rabbits?

• A. forest and ocean

• B. ocean and estuary

• C. grassland and forest

• D. estuary and grassland