The Deep Ocean

Which ocean zone contains hydrothermal vents?

• deep zone

• surface zone

• shallow zone

• intertidal zone

Which contributes most in supporting life on the deep ocean floor?

• cold water temperatures

• extreme water pressure

• hydrothermal vents

• lack of predators

Which is most likely to be the energy source for organisms living in hydrothermal vents?

• oxygen

• methane

• sunlight

• carbon dioxide

Which has deep sea technology helped enhance understanding of the most?

• chemosynthesis

• photosynthesis

• the water cycle

• the carbon cycle

Which ecosystem difference is most likely true?

• The deep ocean has more plants than an estuary.

• The deep ocean has less sunlight than an estuary.

• The deep ocean has a lower salt concentration than an estuary.

• The deep ocean has more concentrated nutrients than an estuary.

Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source?

• chemosynthesis

• hydropower

• electrical charge

• thermal heat

Light does not reach the bottom of the ocean, yet certain species live there. Which best explains how species on the bottom of the ocean get energy to live?

• Algae and bacteria produce energy through photosynthesis.

• Hydrothermal vents produce energy through chemical reactions.

• Dead plants and animals produce energy through decomposition.

Scientists have found strange new life­forms called “tubeworms” on the deep ocean bottom. Which most likely provides energy for the tubeworms?

• algae

• small fish

• photosynthesis

• hydrothermal vents

Why do plant plankton not grow in the deep ocean?

• because sunlight does not reach the deep ocean

• because too many animals eat it before it can grow

• because there are not enough dissolved gases to support it

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

Which best describes the base of the food web in the deep ocean habitat?

• methane­-consuming bacteria

• oxygen-­consuming bacteria

• saline­-consuming bacteria

• sulfur­-consuming bacteria

Tags

NGSS.MS-LS2-3