Oceanography

Sonar uses what waves to map the ocean floor?

• sound

• transverse

• electromagnetic

• tsunami

Why are coral reefs among the most diverse ecosystems on Earth?

• They are made or different corals

• Plants and animals live in the cracks and crevice of the coral reefs.

• They are present in all different parts of the seas.

• They form limestone islands.

Abyssobrotula galatheae found in Puerto Rico Trench is what species?

• gold fish

• catfish

• eel

• amphibian

Light supply in the bathypelagic comes from the

• sun

• bioluminescent creatures

• Volcanoes

• trenches

What zone was bioluminescent organisms were first noted?

• Mesopelagic

• Bathypelagic

• Hadalpelagic

• Abyssopelagic

Spring tides occur at the time of the full and new moon when the moon, Earth and the sun are approximately

• at right angle

• aligned

• scatted

• revolving

96.5% of the ocean is what?

• oxygen

• salt

• whale

• water

Which of the following is not a nekton?

• Fish

• Whale

• Turtle

• Crab

Considered as the world's largest ecosystem.

• Mesopelagic

• Coral reefs

• Epipelagic

• Bathypelagic

Largest and deepest ocean.

• Atlantic

• Indian

• Arctic

• Pacific