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WorksheetsOur Planet - Coastal Seas
Total questions: 20
Worksheet time: 20mins
The seas bordering land make up how much of the world's oceans?
Half
Third
Quarter
Less than a tenth
What percentage of marine life lives in coastal waters?
90%
70%
50%
30%
What is the sea floor in coastal waters rich in?
Oxygen
Carbon dioxide
Sunlight
Nutrients
Shallow tropical waters in Everglades National Park are covered in what?
Kelp
Sea grass
Algae
Mangroves
What do Bottlenose Dolphins use to assist them when hunting?
Highly developed sense of smell
Echolocation
Electrical impulses
Extra sensitive tastebuds
What do the dolphins do to help them catch the fish?
Make clicking noises
Splash with their tails
Encircle them with a ring of mud
Dive underwater
What has happened in the National Park to ensure enough food for the dolphins?
Hunt other animals which might use their food supply
Ban the use of boats
Only allow seasonal tourism
Ban commercial fishing
How many much more carbon dioxide is absorbed by sea grass compared to rainforest?
x15
x25
x35
x45
What is the challenging factor that mangroves are able to deal with in coastal waters?
Shallow water
Being eaten by herbivores
Varying saltiness
High intensity UV radiation
What percentage of all marine species live in coral reefs?
10%
25%
50%
75%
What has caused shark populations to decrease by 90%?
Deforestation
Poaching
Global warming
Over-fishing
What advantage to white-tipped reef sharks have over other sharks?
Camouflage
Ability to fit into narrow spaces in coral
Extra sharp teeth
More sensitive hearing
What problem has been caused by rising sea temperatures?
Coral bleaching
Deforestation
Eutrophication
Increased poaching
Which of the following is FALSE about sea otters?
They have the densest fur of any animal
Sea urchins are a common food source
They consume up to half their body weight in food every day
They need to return to the water's surface for air
Sea Otters and Sheephead Wrasse help to keep down the number of _______________ in coastal waters.
Kelp
Sea Urchins
Starfish
Plankton
How long has it been since the Humpback Whale's last meal?
Days
Weeks
Months
Years
What does the Humpback Whale do to concentrate the fish?
Blow a curtain of bubbles
Swallow them in bulk
Swim around them quickly
Create waves using its tail
Which organisms are taking over waters once rich in fish species?
Jellyfish
Starfish
Plankton
Spider crabs
If anchovy populations are able to recover, how many seabirds could they sustain as a food source?
1 million
10 million
25 million
50 million
The lagoon in Raja Ampat Islands in Southeast Asia now functions as what?
Breeding ground for dolphins
Kelp forest
Food source for humpback whales
Nursery for baby sharks
