The biogeochemical Cycles

Which is NOT a process of the water cycle?

• precipitation
• freezing
• transpiration
• evaporation

Why do living things need nitrogen?

• To get energy

• To make amino acids

• To make proteins

• To make proteins AND amino acids

Where is carbon stored in the environment?

• Fossil fuels
• Wood of trees
• Calcium carbonate (shells and bones)
• All of the above

What converts nitrogen into a useable form for plants and animals?

• bacteria
• fungi
• rain

Which nutrient is not cycled through the atmosphere?

• carbon
• nitrogen
• phosphorous
• water

This is released by the weathering of rocks.

• Carbon
• Oxygen
• Phosphorus
• Nitrogen

What cycle are fossil fuels part of ?

• carbon

• oxygen

• nitrogen

• phosphorus

What is the largest reservoir for nitrogen?

• the ocean

• rocks and minerals

• the atmosphere

• bacteria

The carbon in coal, oil, and natural gas came from

• the combustion of fossil fuels

• the remains of dead organisms

• carbon-fixing bacteria in swamp soil

• carbon dioxide dissolved in ocean water

Nitrogen fixation is the process in which certain bacteria convert nitrogen gas into

• liquid nitrogen

• nitrates

• nitrites

• ammonia