Biogeochemical Cycles Flashcards
Where can carbon be found?
In all organic matter (living things)
What expression is used to describe carbon?
“The backbone of life on Earth”
Would life exist if there was no carbon?
No. Living things are all made of carbon.
What type of reactions happen in the carbon cycle? (transform/transfer)
The transformation of energy
Name the reactions in the carbon cycle.
- Photosynthesis
- Respiration
- Combustion
Write the equation for photosynthesis.
6CO2 + 6H20 + light/energy—–> C6H12O6 + 6O2
carbon dioxide + water + light/energy —-> sugar + oxygen
Write the equation for respiration.
C6H12O6 + 6O2 —–> 6CO2 + 6H20 + energy
opposite of photosynthesis
What is a combustion reaction?
burning - reaction of an element or compound with oxygen to form an oxide and produce heat
Is combustion an oxidation reaction?
yes
What is an oxidation reaction?
A reaction where oxygen is one of the reactants
Draw a carbon cycle.
Draw a carbon cycle.
What does having more carbon in the atmosphere mean?
An increase in global warming
Name the greenhouse gasses
- CH4
- CO2
- H2O
- N2O
Describe the greenhouse effect (how it happens)
- solar radiation powers the climate system
- some solar radiation is reflected by the Earth and the atmosphere
- about half the radiation is absorbed by the Earth’s surface and warms it
- infrared radiation is emitted from the Earth’s surface
What is the greenhouse effect?
Some of the infrared radiation passes through the atmosphere but most is absorbed and re-emitted in all directions by greenhouse gas molecules in the clouds. The effect of this is to warm the Earth’s surface and and the lower atmosphere.