Cycles in the Earth System

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Week 1 Learning Exercise GEOL10040

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1
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Earth's atmosphere contains oxygen because:

  1. oxygen has existed in the atmosphere since Earth's formation

  2. the Earth has an ozone layer

  3. volcanoes emit large amounts of oxygen

  4. photosynthetic organisms produce oxygen

  1. photosynthetic organisms produce oxygen

2
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A mid-ocean ridge is:

  1. formed by two ocean plates pulling apart

  2. where continental crust is formed

  3. formed by two continental plates colliding

  4. where icebergs form

  1. formed by two ocean plates pulling apart

3
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How much carbon is stored within the deep ocean?

  1. 0.381 giga tons

  2. 3.81 giga tons

  3. 381 giga tons

  4. 38100 giga tons

  1. 38100 giga tons

4
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Which of the following is not an atmospheric circulation cell?

  1. Ferrel cell

  2. Hadley cell

  3. Daly cell

  4. Polar cell

  1. Daly cell

5
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Metamorphism is:

  1. a cooling of magma

  2. forming sediments from previously formed rocks

  3. a process of melting rocks

  4. heating and pressurising previously formed rocks

  1. heating and pressurising previously formed rocks

6
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The Earth’s inner core is:

  1. liquid and at temperature of approx. 3700°C

  2. at high temperature (3700°C) but low pressure

  3. at low temperature (370°C) but high pressure

  4. solid and at a temperature of approx. 3700°C

  1. solid and at a temperature of approx. 3700°C

7
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The flux of a river could be defined as:

  1. the volume of water flowing in the whole river at a point in time

  2. the time it takes for a water molecule to travel 1km in the river

  3. the volume of water flowing per unit area

  4. the volume of water flowing per unit time

  1. the volume of water flowing per unit time

8
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Earth’s atmosphere extends to an altitude of approx.:

  1. 600km

  2. 6km

  3. 6000km

  4. 60km

  1. 600km

9
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Greenhouse gases are:

  1. transparent to visible light but absorb mainly ultraviolet radiation

  2. transparent to visible light but absorb mainly infrared radiation

  3. transparent to ultraviolet light but absorb mainly visible radiation

  4. transparent to infrared light but absorb mainly ultraviolet radiation

  1. transparent to visible light but absorb mainly infrared radiation

10
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In thermohaline circulation, dense waters are:

  1. cold and fresh

  2. warm and salty

  3. warm and fresh

  4. cold and salty

  1. cold and salty