Elements & Residence Time Flashcards
0
Q
Recycling of elements: (2)
A
Earth is a closed system for elements.
If they were not recycled then life would cease to exist.
1
Q
Elements are continually transformed from
A
One chemical compound to another, as they pass through the biosphere and geosphere.
2
Q
Residence time: Atmosphere:
A
Water vapour: 11 days
3
Q
Residence time: Biosphere:
A
Soil moisture: 1-2 months.
4
Q
Residence time: Hydrosphere:
A
Water in the oceans: 4000 years.
5
Q
Residence time: Geosphere:
A
Oceanic crust: 60 ma
Continental crust: 650 ma.
