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Chemistary of the atmosphere > Earths formation > Flashcards

Earths formation Flashcards

1
Q

Approximately when was the Earth formed?

A

About 4.5 Billion years ago

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2
Q

How was the Earth formed

A

Intense volcanic eruptions

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3
Q

What were the gases released in the volcanic eruptions

A

Nitrogen, Carbon Dioxide, Water vapour, Ammonia gas

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4
Q

How did the oceans form

A

The Earth cooled down and the water vapour released from volcanic eruptions condensed

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5
Q

How did levels of Carbon Dioxide decrease?

A
  1. Photosynthesis
  2. CO2 dissolved in the ocean
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6
Q

How did Oxygen levels rise

A

Photosynthesis

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7
Q

Is the Greenhouse Effect good or bad?

A

Good, Because without it the Earth would be too cold for humans to live on.

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8
Q

How does the greenhouse effect take place?

A
  1. Electromagnetic radiation comes from the sun and hits Earths surface
    2.Short wavelength radiation is absorbed
  2. Long wavelengths radiation reflected back out into space ( Infrared )
  3. Infrared radiation is absorbed by greenhouse gases and reflected back
  4. The Earth warms up
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9
Q

When can the Greehouse Effect be Negative

A

Enhanced greenhouse effect ( increase levels of greenhouse gases Co2 , CH4)

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10
Q

What process increases greenhouse gas levels

A
  1. Burning of fossil fuels - Release Co2
  2. Deforestation - Release Co2 / prevents abosorbtion of co2.
  3. Farming ( rice feilds) - Release CH4
  4. Catle during digestion - Release CH4
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11
Q

What is formed when fossils fuels are burned ( combustion)

A

Carbon Dioxide, Carbon monoxide, Carbon soot ( “particulates”), Sulphur dioxide

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12
Q

How could car engines effect the atmosphere

A

When car engines heats up Nitrogen and Oxygen in the air react to form Nitrogen Oxides

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13
Q

What is the effect of Carbon Dioxide

A

Global Warming

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14
Q

What is the effect of Carbon Monoxide

A

Toxic Gas

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15
Q

Why is Carbon Monoxide a problem

A
  1. Colourless
  2. Odorless / non-irritating
    Gas
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16
Q

What are the 2 effect of Carbon Soot

A
  1. Causes respiratory problems
  2. Global dimming
17
Q

What is the effect of Sulphur Dioxide

A

Causes Acid rain

Chemistary of the atmosphere (1 decks)

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