4.3 Carbon Cycling and 4.4 Climate Change

Which letter indicates photosynthesis?

• A
• B
• C
• D

Which of the following adds carbon to the atmosphere?

• Plants
• Animals
• Both plants and animals
• none of the above

If there is lack of oxygen, acidic conditions and organic matter, what fossil fuel can be formed?

• Peat

• Oil

• Coal

• Natural Gas

Light coming directly form the sun is short wavelength. 

• True
• False

Decomposers

• add CO2 back to the atmosphere
• can be saprotprohs
• can be detrivtivores 
• all of the above

The ocean becomes more _________________as it absorbs carbon, which is converted to ________________.

• basic, carbonic acid
• basic, hydrochloric acid
• acidic, hydrochloric acid
• acidic, carbonic acid

Compacted shells of ancient ocean organisms used in construction is known as 

• limestone
• shale
• coal
• none of the above

Biogas is made from

• oil
• peat
• methane
• none of the above

Methanogens produce methane gas. What is this gas converted to in the atmosphere?

• Carbon dioxide and oxygen

• Ethanol and carbon dioxide

• Carbon monoxide and ozone

• Carbon dioxide and water

How is peat formed?

• From methanogenic archaeans under anaerobic and acidic conditions in deep sea vents

• From partially decomposed organic matter under anaerobic and acidic conditions in waterlogged soils

• From porous limestone under high pressure, aerobic and alkaline conditions in ocean beds

• From bituminous coal under high pressure, anaerobic and acidic conditions below ground