Biogeochemical Quiz 04/21/23

What process converts nitrogen gas into a biologically useful (fixed) form?

• Respiration

• Assimilation

• Denitrification

• Nitrogen fixation

Which organisms play the largest role in converting nitrogen into various usable forms and back to a gas form?

• rabbits

• bacteria

• plants

• worms

How do animals get nitrogen to make important biological molecules?

• Breathe it in through the air

• Fix it from nitrogen gas

• Consume other organisms

• Assimilate it through the soil

Which of the following is not a possible process that results in ammonification?

• photosynthesis

• decomposition

• nitrogen fixation

• fertilizer production

What happens to carbon during the process of photosynthesis?

• CO₂ is released by plants

• CO₂ is taken up by plants

• organic carbon is taken up through plant roots

• carbon is lost through heat

All the gases surrounding Earth are known collectively as the...

• hydrosphere

• biosphere

• atmosphere

• lithosphere

Which of the following best describes weathering and erosion?

• when it rains on rocks

• decay of dead organisms

• break down of rocks that wash into the water

• when a volcano erupts

Which of the following best describes the Greenhouse Effect?

• when solar radiation reflects off the atmosphere

• heat is retained in Earth's atmosphere by greenhouse gases

• plants grow better when a greenhouse is filled with CO₂

• when solar radiation hits Earth's surface directly

Which gas is most abundant in the atmosphere?

• carbon dioxide

• methane

• nitrous oxide

• nitrogen gas

Which of the following does NOT release carbon dioxide into the atmosphere?

• volcanic activity

• respiration

• photosynthesis

• fossil fuel combustion