Life Below Water Quiz eTwinning 2023

1.     What percentage of the Earth’s surface does the ocean make up?

• 65%

• 71%

• 78%

Answer explanation

“Today, we know that the ocean makes up about 71% of the Earth’s surface, and it is the biggest ecosystem of the planet, holding 99% of all habitable space in the world.” 

Source: https://oceanliteracy.unesco.org/ocean-exploration/

2. How much of the ocean has been explored?

• 5%

• 10%

• 15%

Answer explanation

“It might be shocking to find out, but only 5% of the ocean has been explored and charted by humans. The rest, especially its depths, are still unknown.”

Source: https://oceanliteracy.unesco.org/ocean-exploration/

3. The five main ocean basins, the Pacific, Atlantic, Indian, Arctic and Southern Oceans contain … % of the world’s wildlife

• 49%

• 56%

• 94%

Answer explanation

“The five main ocean basins, the Pacific, Atlantic, Indian, Arctic and Southern Oceans contain 94% of the world’s wildlife.”

Source: https://oceanliteracy.unesco.org/ocean-exploration/

4. Half of all plastics ever manufactured have been made in the last …….. years.

• 15

• 30

• 45

Answer explanation

“Half of all plastics ever

manufactured have been

made in the last 15 years.”

https://www.nationalgeographic.com/environment/article/plastic-pollution

5. Plastic production was ……….. million tons by 2015.

• 318

• 448

• 538

Answer explanation

"Production increased

exponentially, from 2.3 million

tons in 1950 to 448 million tons

by 2015. Production is

expected to double by 2050."

(= 896 million tons by 2050!)

https://www.nationalgeographic.com/environment/article/plastic-pollution

6. Every year, about ….. million tons of plastic waste escapes into the oceans from coastal nations.

• 8

• 80

• 800

Answer explanation

“Every year, about 8 million tons

of plastic waste escapes into

the oceans from coastal

nations.

That’s the equivalent of

setting five garbage bags

full of trash on

every foot of coastline

around the world.”

https://www.nationalgeographic.com/environment/article/plastic-pollution

How many pieces of plastic did Dr Jennifer Levis find in the belly of a dead bird?

• 0

• 234

• 432

Answer explanation

The epic journey of .................................. plastic ducks began in 1992.

• 20000

• 25000

• 29000

Answer explanation

How many tons of plastic are already in the ocean?

• 50

• 100

• 150

Answer explanation

How many plastic-filled gyres are there in the world's seas?

• 2

• 5

• 7

Answer explanation