Section 22: Chemistry of the Atmosphere 2 Flashcards

1
Q

What is the approximate proportion of nitrogen in Earth’s current atmosphere?

A

80%

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2
Q

What is the approximate proportion of oxygen in Earth’s current atmosphere?

A

20%

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3
Q

How did algae and plants reduce levels of carbon dioxide in Earth’s early atmosphere?

A

By photosynthesising

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4
Q

What was formed when shells of organisms made using dissolved carbon dioxide fell to the bottom of the ocean and were covered and compressed?

A

Sedimentary rock

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5
Q

What was formed when plants that grew millions of years ago died and were trapped and compressed under rocks?

A

Coal

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6
Q

What was formed when plankton that lived in the ocean millions of years ago died and were trapped and compressed under rocks?

A

Crude Oil and Natural Gas

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7
Q

Name three greenhouse gases

A

Water Vapour, Carbon Dioxide, and Methane

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8
Q

Describe the wavelength of radiation that comes from the sun and is reflected by the Earth

A

From the Sun: short wave,

From the Earth: long wave

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9
Q

What happens to the long wave radiation that is reflected from the Earth in the atmosphere?

A

It is absorbed by greenhouse gases

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10
Q

What is the name given to the process that warms up the surface of the Earth?

A

The greenhouse effect

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11
Q

What human activities increase carbon dioxide levels?

A

Deforestation and burning fossil fuels

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12
Q

What human activities increase methane levels?

A

Farming animals and landfill

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13
Q

What is the name given to the increasing average temperature of the Earth?

A

Climate Change

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14
Q

Name an effect of climate change

A

Increased flooding, changes in rainfall patterns, frequency of storms, amount of water in a habitat etc…

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