1.  What is the name of the submersible (submarine) used to explore the vent communities?

2. How do the scientists compare the productivity of the vent communities to ordinary ecosystems on the floor of the deep sea?

A) Much lower, very few animals
B) About the same, but much more diverse
C) Much higher, faster growth rates and larger animals
D) Much lower, many different types of animals, but few in number and biomass

3. On the dive they discover an octopus that is part of the vent community. What two types of animals does the octopus eat that are mentioned in the video?

4. The octopus is thus a ____________ in the vent communities.
A) Primary producer B) Primary consumer C) Secondaryconsumer D) Decomposer

5. What color is the blood of both the mussels and thetube worms?
A) Red B) Clear C) Blue D) Green

6. The mussels and tube worms have __________ in theirblood.
A) Chlorphyll B) Cyanocobalimine C) Hemoglobin D) Manganese

7. The ultimate source of the energy for the vent ecosystemsis:
A) Heat energy from the earth's interior
B) Wave energy transmitted from the wind into the oceans
C) The energy of sunlight for photosynthesis
D) The gravitational energy causing tidal forces

8. How were the crabs collected from the ventcommunity?

9. What type of plate boundary is the GalapagosRift?
A) Divergent B) Convergent C) Transform

10. Which of the following are primary producers in thevent communities?
A) Mussels B) Octopus C) Chemosynthetic bacteria D) Crabs

11)Of the 1.8 million known species on Earth, land environmentshave ______ % and marine environments have_______ %.