The impact of human activity on the carbon and water cycles Flashcards

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1
Q

What is happening to the shells of many sea creatures?

A

They are getting weaker

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2
Q

Why is there a decrease in the PH of the Earth’s oceans?

A

This is caused by the uptake of carbon dioxide from the atmosphere

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3
Q

What does the absorbed CO2 in the ocean break down to form?

A

Carbonic acid and hydrogen ions

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4
Q

What does increased CO2 limit in the oceans?

A

It limits growth in the oceans

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5
Q

If an acidic ocean has a lower concentration of carbonate ions, what does this limit?

A

It limits the ability of marine life to create calcium based structures

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6
Q

What percentage of emissions from fossil fuels has the ocean absorbed?

A

25%

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7
Q

Since the industrial revolution how has the PH of the ocean been affected?

A

It has decreased by 0.1 from 8.2 to 8.1

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8
Q

How will ocean acidification impacts be amplified?

A

Due to other factors such as temperatures, destructive cyclones and pollution

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9
Q

If the speed of acidification is slow what may organisms be able to do?

A

They may be able to adapt to the changes and be more resilient

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10
Q

Which Ocean is likely to be first affected by a change in PH?

A

The arctic ocean due to its low PH-its cold corals will be threatened

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11
Q

What do reduced Carbonate ions in the ocean mean for some marine life?

A

Animals like coral expend more energy in building their shells, resulting in thinner more fragile shells

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