Living in the Dark

Marine snow is a source of

• oxygen
• food
• light
• bacteria

Prior to 1977 why did scientists believe that only very basic life forms lived in the deep ocean?

• currents are too strong
• poisonous gases
• no food sources
• too cold of temperature

Why were scientists surprised to find the Garden of Eden near the hydrothermal vents?

• they thought that environment could not support life
• vents were expected to exist
• creatures there were just like creatures on land
• the scientists were geologists, not biologists

What is one way technology is making ocean research easier?

• newer cameras that are smaller and less expensive
• larger and faster undersea vehicles
• unmanned vehicles can be used
• video footage of dives can be sent to other scientists

How do seep communities affect earth's climate?

• they stop greenhouse gas from escaping
• they leak cold air 
• they form around oil and natural gas
• they release methane into atmosphere

What can scientists conclude from seeing the same species at whale falls, cold seeps, and hydrothermal vents?

• the communities develop the same in all 3 habitats
• species use whale falls as stepping stones from one habitat to another
• whale falls support all species
• each habitat is isolated by distance

cache is something

• with money
• hidden
• destroyed
• found

geysers are

• a gas leak
• undersea habitat
• chemical process
• natural hot spring

a meager meal is

• huge
• delicious
• bland
• insufficient

when things decompose they 

• break down
• change color
• change size
• die