Oceans produce:
Ocean threats

Quiz
•
Education
•
1st - 5th Grade
•
Hard
Beatrice F
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
25% of the oxygen on Earth
between 25% and 50% of the oxygen on Earth
between 50% and 75% of the oxygen on Earth
All the oxygen on Earth
Answer explanation
Oxygen production from the ocean - The ocean and the photosynthesis of its plant organisms (phytoplankton in particular) absorb CO2 and produce oxygen (O2).
The ocean thus absorbs 30% of the planet's CO2 and produces between 50% and 75% of the oxygen we breathe.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these human activities is not a threat to the oceans?
Oil and gas extraction
Carbon dioxide emissions
Overfishing
Tourism
Swimming
Answer explanation
The first 4 activities are gradually destroying the resources of the oceans.
– Digging to extract gas and oil damages the seabed and destroys the habitat of marine flora and fauna.
– If there is too much CO2 in the air, the ocean may no longer be able to clean the air.
– By fishing too much, we destroy the natural balance of the sea and we make certain species disappear.
– Pollution from tourists (bags, plastic bottles) endangers the inhabitants of these oceans.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the last 50 years, the world production of plastic has been multiplied by:
10
20
50
Answer explanation
We produce 20 times more plastic today than 50 years ago. We produce an average of 400 million tonnes of plastics every year.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many millions of tons of plastic are dropped into the oceans each year?
Between 2 and 4 million tons
Between 8 and 12 million tons
Answer explanation
Every minute, the equivalent of a plastic garbage truck is dumped into the ocean.
If nothing is implemented, this number will increase to two per minute by 2030, and to four per minute by 2050.
At the current rate of pollution, by 2050 there will be more plastic than fish in the oceans.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Plastic is dangerous for biodiversity and kills...
more than 1 million seabirds per year
200,000 seabirds per year
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In new Zealand, we recycle:
28% of plastic in circulation
50% of plastic in circulation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A plastic bag has a lifespan of:
30 years
400 years
Answer explanation
Between 100 and 400 years depending on the type of plastic bag. To deal with this pollution, several countries including France have banned their use.
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