Problem 1
Fill in the blanks with the correct words. Animals such as whales, sea turtles, and fish are examples of __________.
Problem 2
Fill in the blanks with the correct words. __________ occurs in areas where organisms use sulfur as energy to produce their own food.
Problem 3
Why is oil entering the ocean a concern? A. The presence of oil can reduce water quality. B. The presence of oil in the water is not harmful to marine life. C. Large spills can be easy to clean up. D. The presence of oil can improve water quality.
Problem 4
A rigid, wave-resistant structure built by corals from skeletal materials is A. an estuary. C. a beach. B. a reef. D. a rocky shore.
Problem 5
Fill in the blanks with the correct words. An area where the mouth of a river opens into an ocean is a(n) __________.
Problem 5
Some bacteria undergo chemosynthesis. Chemosynthesis is A. a process that involves using sulfur or nitrogen compounds as an energy source to produce food. B. a process by which other organisms are consumed as a source of energy. C. a process by which reproductive cells are released into the water. D. a process that involves using light from the Sun as an energy source to produce food.
Problem 6
What are formed along subduction zones? A) mid-ocean ridges B) continental shelves C) trenches D) density currents
Problem 6
Which is a producer? A. the Sun C. sea urchin B. kelp D. sea star
Problem 7
Producers undergo which process in order to make food? A. bioluminescence B. respiration C. reproduction D. photosynthesis
Problem 7
What are ocean organisms that drift in ocean currents called? A) nekton C) benthos B) pollutants D) plankton
