Ocean Currents Can Disperse And Concentrate Pollution Flashcards

1
Q

What is the accumulation of debris in the North Pacific gyre known as?

A

Great Pacific Garbage Patch

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2
Q

What is a gyre?

A

Circular currents formed by wind patterns and rotation of the planet

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3
Q

What is the centre of a gyre like?

A

Usually calm and once debris is carried there it stays

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4
Q

What sort of debris is in the garbage patch? (4)

A

Bottles
Nets
Yoghurt Pots
Cotton Bud Shafts

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5
Q

Where is most of the debris in the garbage patch?

A

Most at the surface but some is suspended several meters below

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6
Q

Why is the patch invisible to satellite imagery?

A

The garbage is so small and has low density

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7
Q

How many pieces of plastic total are there in the patch?

A

1.8 trillion

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8
Q

What is the 2050 prediction?

A

Weight of plastic in the oceans > weight of fish in the oceans

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9
Q

What % of marine debris is plastic?

A

80%

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10
Q

Most plastic is multi-use. True or false?

A

False

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11
Q

How much plastic pollution occurs globally every year?

A

14 million tons

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12
Q

What decade are plastics from, which are being found in the stomachs of sea birds like albatross? And what does this say about plastics?

A

1940s
They are long lived

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13
Q

How many animals die annually from entanglement?

A

100,000

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14
Q

What is the effect of plastics on birds hormones?

A

Cannot reproduce

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15
Q

How does plastic pollution impact turtles?

A

They have to crawl through plastic to nest, impacts temperature of the eggs, impacts success rates of breeding

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16
Q

How can plastic pollution impact humans?

A

chemicals contained in plastics are harmful once in food chain risk can be transferred to humans

17
Q

What biological process does plastic impact?

A

Digestion

18
Q

What is the impact on seals?

A

Large pieces of plastic can become wrapped around, which leads them to be strangled and drown

19
Q

What size are microplastics?

A

less than 5mm

20
Q

Marine debris is pollution. True or false?

A

True