6.4 - Intertidal Zone

Intertidal Zone that is exposed to air twice a day during low tide. Experiences prolonged time submerged with periods of desiccation. Mechanical stress from waves.

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

Tags

NGSS.MS-LS1-5

Intertidal Zone that is above the high tide mark. Is only covered by the highest spring tides, and experiences extreme temperature variations.

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

Intertidal Zone that is covered by water except for the lowest spring tides. Most stable area in the intertidal zone.

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

Intertidal Zone that has the lowest diversity (periwinkles, limpets,, lichens)

• Splash Zone

• Upper Shore

• Middle Shore

• Lower Shore

"Clam Up" is an adaptation for molluscs that help them to

• run and hide

• prevent moisture loss

• communicate with other clams

• feed

Adaptations that help intertidal organisms withstand mechanical wave stress include (select all that apply)

• attach to the rock with a holdfast

• Low profile shells

• shells with ridges and light coloration

• finding shelter in crevices

Characteristics of sandy shores include (select all that apply)

• Stable

• porous substrate

• can become completely dry during low tide

• high biodiversity

• organisms tend to burrow in the substrate

Based on the barnacle distribution data provided, what elevation has the highest barnacle density?

• 1

• 2

• 4

• 7

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which would be the best explanation for the barnacle distribution seen on this graph?

• barnacles densities are higher where it is dry most of the time

• Barnacles densities are higher where they are submerged for longer periods of time

• Barnacles densities are higher where they are submerged all of the time.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The Lugworm is found on sandy shores. Which adaptation best allows this worm to survive in this habitat?

• Attaching to a hard substrate

• Clamming up

• can withstand dessication

• Burrowing into the sand

Tags

NGSS.MS-LS2-1