1.4 - Anthropogenic Change Flashcards

1
Q

Explain one way farming produces greenhouse gases.

A

Methane released from cattle in digestion as they burp it out.

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2
Q

Describe one way in which human activity is contributing to climate change.

A

Fossil fuels are released into the atmosphere and are contributing to greenhouse gases which in turn are increasing and slowly heating up the Earth’s average temperature.

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3
Q

Explain why the UK’s climate might change in the future.

A

Increased Greenhouse Gases
Trap more more heat is trapped
Long-wave radiation cannot escape,
meaning that the average temperature is increasing.

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4
Q

Name 2 greenhouse gases.

A

Methane, Carbon Dioxide, Nitrous Oxide, CFC’s.

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5
Q

In the developed world how many tonnes of CO2 per person are produced?

A

10-25.

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6
Q

In the developing world how many tonnes of CO2 per person are produced?

A

1-3

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7
Q

How do greenhouse gases cause climate to change

A

Long-wave energy is unable to pass through greenhouse gases and are reflected back to Earth

Greenhouse gases act like a blanket around the Earth

They trap long-wave energy - it can’t pass through and are reflected back to Earth

This trapped heat causes the planet to warm up.

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8
Q

How does the greenhouse effect work?

A

The sun’s energy arrives as short-wave radiation
Short-wave rays are able to travel through greenhouse gases.
This energy is reflected off the Earth as long-wave radiation.
Long-wave energy is unable to pass through greenhouse gases and are reflected back to Earth

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9
Q

What is short-wave radiation?

A

Incoming solar radiation -

It’s absorbed by the Earth

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10
Q

What’s long-wave radiation?

A

Re-emitted by the Earth

Trapped by greenhouse gases

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11
Q

How does transport cause climate to change?

A

Travelling in petrol/diesel vehicles releases carbon dioxide

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12
Q

How does power generation cause climate to change?

A

The majority of power stations use fossil fuels, which release carbon dioxide when burnt, to generate electricity

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13
Q

How does deforestation cause climate to change?

A

Trees absorb carbon dioxide and therefore cutting down trees prevents future carbon from being locked away

OR: Felled logs are often burnt to make way for farming adding further CO2 into the atmosphere

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14
Q

How do large cattle herds cause climate to change?

A

Grazing cattle produce large amounts of methane when digesting food.
Methane is a powerful greenhouse gas.

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15
Q

How does the expansion of rice farming cause climate to change?

A

Organic matter decomposing in flooded paddy fields results in the release of methane.

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