Deep Sea Organisms

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

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

The deepest parts of the ocean floor, near hydrothermal vents and ocean treenches, is called _______.

• aphotic

• benthic

• pelagic

• abyssal

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

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

Which would most likely be discovered by researchers exploring the deep ocean with remotely operated vehicles (ROVs)?

• new terrestrial species

• new phytoplankton species

• new photosynthetic species

• new chemosynthetic species

Deep sea animals use bioluminescence to:

• attract mates

• attract prey

• see

• all of these