Human Ocean Dependence

First Name

Last Name

Class Period

• 1st
• 2nd
• 4th
• 5th
• 6th

1. Which is not something that the world ocean provides?

• trees
• food
• medicine
• recreation
• transportation

2. What is called when an algae bloom occurs?

• ocean tide
• blue tide
• spring tide
• red tide

3. The lack of ___ in the water can cause the deaths of massive amounts of fish and other organisms.

• nitrogen
• oxygen
• aluminum
• sulfur

4. True of False. Dead zones can be found in the Gulf of Mexico.

• True
• False

5. True or False. Artificial reefs are built to help support new populations of a community.

• True
• False

6. Some areas of an ocean are known as dead zones. These zones form when excess organic material decomposes. This increased decomposition uses up the oxygen from the water. Which human activity is most affected by the increasing number of dead zones in the ocean?

• Offshore oil drilling, because water in dead zones is toxic
• Commercial fishing, because fish cannot survive without oxygen
• Commercial shipping, because dead zones change the course of ocean currents
• Sand mining, because oxygen is not available to form the sands on ocean beaches

7. A coastal area that once supported a thriving fishing industry is overfished. The number of species found living in the marine ecosystem decreases. Which of these activities is most likely to increase the natural biodiversity in the area?

• Building artificial reefs and limiting fishing activity
• Introducing non-native species to fill unoccupied habitats and banning fishing
• Building artificial reefs and increasing fishing activity
• Eliminating non-native species and encouraging fishing for large predatory fish