5.L.2.1 #3

Which list of organisms could be found living in an ocean and an estuary

ecosystem?

• ducks, deer, and reptiles

• jellyfish, crabs, and dolphin

• black bear, deer, and insects

• insects, reptiles, and prairie dogs

Which correctly compares lakes and ponds?

• Ponds are usually larger and deeper than lakes.

• Lakes are usually larger and deeper than ponds.

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

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

  ponds do not.

Which explains the difference between a pond and an estuary?

• A pond is very shallow and an estuary is very deep.

• A pond contains no plants and an estuary contains plants.

• A pond is affected by tides and an estuary is not affected by tides.

• A pond contains freshwater and an estuary contains fresh and salt

  water.

Which is a characteristic common to oceans and estuaries?

• contains only salt water

• contains only freshwater

• supports little to no animal life

• affected by the rise and fall of tides

How are salt marshes and lakes different?

• Salt marshes are freshwater and lakes are salt water.

• Salt marshes are connected to the ocean and lakes are inland.

• Salt marshes cannot sustain life and lakes have many organisms.

• Salt marshes are not affected by tides and lakes are affected by

  tides.

Why are salt marshes and estuaries important for ocean life?

• They minimize damage to oceans during hurricanes.

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

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

• They increase the amount of sediment able to settle on the ocean

  floor.

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

• a lake

• a prairie

• a coastline

• the mountains

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

population?

• ponds and lakes

• estuaries and forests

• grasslands and oceans

• salt marshes and deserts

Which best compares a lake and an estuary ecosystem?

• They both have plants growing in their deepest water.

• They are both affected by the daily changing of tides.

• They both contain a mixture of salt water and freshwater.

• They are both affected by seasonal changes in water temperatures.

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

• estuary

• forest

• grassland

• lake