WorksheetsEnvi Man MA 9.1
Total questions: 50
Worksheet time: 25mins
Which are causes of overfishing?
Larger boats (larger holding capacity)
New technology: radar, satellite
Faster boats (travel longer distances)
All of the above
Which type of fishing net is more sustainable?
Diamond shape
Square shape
Which is the largest ocean?
Atlantic Ocean
Indian Ocean
South Sea
Pacific Ocean
By-catch are?
Species with no market-value
Immature fish
Immature fish and species with no market-value
Rare fish
How many types of ocean currents are there?
1 type
2 types
3 types
4 types
5 types
Which is the most sustainable form of fishing?
Line fishing
Surrounding nets
Trawl nets
Seine nets
The area of shallow ocean close to land is called the continental ___________ ?
Sea
Coast
Drift
Table
Shelf
El Nino occurs in which ocean?
South Pacific
North Pacific
Atlantic
Indian
In the northern hemisphere ocean currents spin in which direction?
Clockwise
Anti-clockwise
What does Carrying Capacity mean, in terms of fisheries?
the minimum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that the environment can support.
the maximum number of fish that can be removed from a population, ensuring the population can sustain itself for next year
Commercial fisheries are able to catch more and more fish each year. This is because they use/have:
Navigation (GPS) to find schools of fish
SONAR devices to locate fish
Factory ships to process and preserve fish while out at Sea
All of the above
What is the MOST COMMON type of rubbish found in the sea?
Food waste
Plastic
Paper
Fishing-related items
What is the cause of noise pollution in the ocean?
Human crowd
Loud ship engines
High volume equipment such as loud speaker and radio
Which of the following is NOT the effect of overfishing?
Poor coral reef health
Growth of algae
Threat to the local food sources
Abundant of fish species in ocean
Which of the following does not describe the status of the world's wild fisheries?
Habitat destruction threatens the fisheries
Fish farming has allowed wild fish to recover worldwide
Subsidies are necessary to make the fisheries profitable
Overharvesting threatens the fisheries
The oceans are warming and their acidity is increasing due to climate change. What determines how marine species react to these changes?
How sensitive they are to change
How much they are able to adapt
Their level of exposure to these changes
All of the above
about _____% of the Earth's water can be found in our oceans.
25%
67%
72%
97%
Which statement about ocean resources is true?
Humans get very few resources from the ocean.
Demand for the ocean's resources is increasing.
The ocean is so big that we will never use up the resources.
The ocean's resources have already been used up.
Why is overfishing a problem?
It reduces the fish population.
It leaves the fish population as it is.
It increases the fish population.
It results in holding ponds.
People depend on the oceans for __________________.
Natural resources
Food and water
Transportation
All of the above.
Fresh water can be produced by removing the salt from ocean water using a process called ______________.
salt water cleanup
water purification
desalination
wastewater treatment
How do the oceans contribute to the amount of Oxygen in the Earth's atmosphere?
Fish in the ocean produce oxygen.
Phytoplankton in the ocean produce oxygen through the process of respiration.
Phytoplankton in the ocean produce oxygen through the process of phtosynthesis.
There is no oxygen production in the ocean.
The use of light energy by organisms to convert CO2 and H2O into organic molecules is
chemosynthesis
consumption
photosynthesis
decomposition
Which of the following is NOT a source of pollution in the ocean?
Fertilizers used on land.
Sand drifting along the bottom of the ocean floor.
Oils found on city streets.
Emissions from gas-burning vehicles.
Which piece of evidence BEST explains why trash has accumulated in the ocean?
Humans manufacturing and quickly discarding plastic products has caused the garbage patches to grow.
The best way to discard plastic trash is to dump it in the ocean.
Only plastic that cannot be recycles is found in the ocean.
Trash has not accumulated in the ocean.
The best way to keep the ocean clean is to ______________________.
skim trash regularly
establish regulations for safety and environmental regulations
stop using the ocean as a resource
start a war to take over the ocean as our own resource
What is a fertilizer runoff?
When fertilizer runs into a body of water.
When water makes fertilizer.
When algae grows rapidly.
The industrial production of fertilizers.
What happens when a fertilizer runoff happens?
Fish get bigger.
Algae grow rapidly.
The water becomes very clear.
The oxygen level in the water increases.
What happens to the fish if there is fertilizer runoff?
The fish thrive because of increase in Nitrogen and Phosphorous.
The fish die because of lack of oxygen.
Nothing happens to the fish.
The fish thrive because there is more algae to eat.
Which of the following is the cause of dead zones in the ocean?
An increase in the number of fish.
An increase in runoff from fertilizer
An increase in oxygen
A decrease in oxygen
By far the most important resource that humans obtain from the oceans is fish. This term can be used to include true fish, or finfish, but also shellfish and other animals that live in the sea and can be eaten
tourism
transportation
food
energy
The main fisheries are located on the ____________. This is because the water is shallow there, so light can penetrate and there is more oxygen than further down.
continental shelves
continental drift
continental oasis
continental shallows
There is an enormous amount of energy in the waves that break on the shores all around the world. It is estimated that if this energy could be harvested it would be to twice the present world's energy production.
tidal energy
hydroelectric power
current
solar energy
Ships that transport food such as rice and wheat.
bulk carriers
ferries
ocean liner
tankers
the type of ship transport of fluids, especially oil and petroleum products
bulk carriers
tankers
cruise ships
roll on/off ships
Ships that transport perishable items like vegetables, fruits, fish and diary products.
refrigerated ships
tankers
ferries
cruise ships
Currents, or strictly speaking surface currents, are caused mainly by _____
wind
location
fish
trenches
Fish are animals and so cannot make their own food. Herbivorous fish rely on the primary producers of the sea, which are nearly always green algae called __________
phytoplankton.
shrimp
grill
cobs
One of the most famous, and also the largest, fishery in the world is the ____________ fishery off the west coast of South America.
Peruvian anchovy
Atlantic tuna
Pacific cod
Eastern salmon
The upwelling described in the Peruvian anchovy fisheries disturbed approximately once every 10 years by an event called the _______.
El Niño
La Nina
South east monsoon
North east monsoon
How does increased carbon dioxide affect our oceans?
CO2 does not affect the oceans
CO2 makes the oceans more alkaline (basic).
CO2 is reacts with H2O to make carbonic acid, making the oceans more acidic
CO2 speeds up photosynthesis in the oceans
How does increasing acidity affect life forms that have shells?
More acid helps them build shells
More acid keeps them from being eaten
Changes in acidity don't affect organisms with shells
Acidity decreases the carbonate ions life forms need to make shells
How does increasing acidity in the oceans affect plankton?
It speeds up their growth and helps them flourish.
It slows their growth and makes them less hardy.
Plankton are not affected by acidity
What does Maximum Sustainable Yield mean, in terms of fisheries?
the minimum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that the environment can support.
the maximum number of fish that can be removed from a population, ensuring the population can sustain itself for next year
What does Optimal Catch mean, in terms of fisheries?
the minimum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that can be removed each year so that the fish left behind can sustain themselves.
the maximum number of fish that the environment can support.
the maximum number of fish that can be removed from a population, ensuring the population can sustain itself for next year
