Ch 13 Oceans

Where do benthos live?

• near the ocean's surface

• on or in the ocean floor

• in the intertidal zone

• in the open ocean

How many ecological zones make up the benthic environment?

• 2

• 3

• 4

• 5

The deep-ocean basin consists of the abyssal plain, mid-ocean ridges, ocean trenches, rift valleys, and

• seamounts.

• hot spots.

• tectonic plates.

• continental crust.

The ocean’s surface temperatures vary with time of year and

• latitude

• longitude

• seasons

• moon phases

The movement of water from ocean to the atmosphere to the land and back to the ocean is called

• water evaporation.

• water condensation.

• water precipitation.

• the water cycle.

The longer it takes sound to return to a ship,

• the louder the sound becomes.

• the weaker the sound becomes.

• the closer the ocean floor is in that spot.

• the deeper the ocean floor is in that spot.

Which of the following statements describes plankton?

• All are plant-like.

• All are animal-like.

• Most are microscopic.

• All swim actively in the open ocean.

Which of the following statements describes nekton?

• They live on the ocean floor.

• They swim actively in the open ocean.

• Most are microscopic.

• All are fish.

Which of the following statements describes benthos?

• They swim in the open ocean.

• Most are microscopic.

• All are plant-like.

• They live on or in the ocean floor.

Marine organisms are grouped by

• where they live and how they move.

• whether they have scales or shells.

• how long they live.

• how big they are.