What percentage of the Earth's surface is covered by the oceans and seas?
a. 45 b. 53 c. 61
d. 71
How many tonnes of phytoplankton are produced each year in the world's oceans?
a. 250 million b. 50 billion
c. 200 billion
d. 2 trillion
Within the oceans there are places where cooler waters come to the surface. Why is this upwelling important?
a. Marine creatures are drawn to the cooler water.
b. The water brings up nutrients from depth that supports the growth of phytoplankton.
c. Water from the deep ocean is cleaner. d. All of the above
Of all the species of fish, what percentage of them live in the oceans and seas?
a. 15 b. 30 c. 50
d. 60
The blue whale is the largest animal to have ever lived on earth. How heavy can they get?
a. 50 tonnes b. 75 tonnes c. 100 tonnes
d. 150 tonnes
In 1900 there were thought to be 150,000 blue whales. How many are there now?
a. 5,000
b. 15,000 c. 50,000 d. 100,000
How many people on Earth live within 100 kilometres of the seashore?
a. 1 billion b. 2 billion
c. 3 billion
d. 4 billion
People in the Minamata Bay area in Japan were seriously affected by pollution during the 1950s. Which type of pollution caused severe nervous disorders?
a. Spillage from an oil tanker
b. Methyl mercury in seafood
c. Sewage outfall d. Radioactive waste dumping
What caused the environmental degradation of the Black Sea?
a. An increased discharge of nutrients into the sea caused eutrophication. b. Commercial species were overfished. c. Poor coastal management and mass tourism became prevalent.
d. All of the above
What does IMO stand for?
a. Intrepid Marine Observer b. Inter-relations between Man & Oceans
c. International Maritime Organisation
d. International Migration Office
Which of the following measures could help protect the oceans?
a. Discouraging ocean dumping b. Requiring separate sewage and storm run-off lines in urban areas c. Requiring double hulls for all petroleum tankers
d. All of the above
Which species uses photosynthesis in the seas and oceans?
