NWR Ecosystems (Biomes Only)

Which type of ecosystem has the greatest variation (change) in temperature from its top to its bottom?

• lake

• pond

• ocean

• estuary

In which ecosystem can the greatest variety of organisms be found?

• lake

• pond

• rainforest

• grassland

Which best describes a characteristic of both lakes and estuaries?

• both have saltwater

• both have freshwater

• both have grasslands

Grasslands have very few trees while forests have many trees. Why is this statement true?

• Grasslands receive less rain than forests.

• Grasslands receive less sunlight than the forests.

• The animals of the grasslands eat small trees before they can grow.

Which best describes a forest ecosystem?

• an ecosystem with various trees, shrubs, diverse animals, and adequate rainfall

• an ecosystem with freshwater surrounded by land and includes a variety of animals

• an ecosystem with only grass, fertile soil, and varying temperatures depending on location

Which statement best compares a pond ecosystem to a lake ecosystem?

• A pond ecosystem is usually more shallow.

• A pond ecosystem usually has more organisms.

• A pond ecosystem usually receives less sunlight.

Which two ecosystems are terrestrial?

• ponds and lakes

• forests and estuaries

• oceans and grasslands

• forests and grasslands

Which best explains the adaptations needed for organisms living in an estuary ecosystem?

• Organisms must be adapted to live in salt water.

• Organisms must be adapted to live in fresh water.

• Organisms must be adapted to live in both fresh water and salt water.

Which is a difference between the plant life of a rainforest and a deciduous forest?

• The deciduous forest has a warm climate year-round, while the rainforest has hot and cold extreme climates.

• The deciduous forest has the most diverse plant life of all ecosystems, while the rainforest plant life is scarce.

• The deciduous forest remains hot and wet year-round, while the rainforest has a yearly cycle of plant growth due to changes of seasons.

• The deciduous forest has yearly cycles of plant growth due to changes of seasons, while the rainforest remains hot and wet year-round.

Which is true of a tropical rainforest?

• They are found only in South America

• Only a few different species of plants and animals can be found there.

• The tree canopy causes only a small amount of sunlight to reach the ground.

• Each organism found in a rainforest can also be found in a deciduous forest.