Geology102:Quiz-Unit15

What percentage of the atmosphere is composed of nitrogen (N2)?

• 21%

• 78%

• 1%

• 0.04%

What is the primary source of the additional carbon dioxide in the atmosphere?

• Volcanic eruptions

• Burning fossil fuels

• Natural processes

• Deforestation

What is the general equation for photosynthesis as mentioned in the text?

• CO₂ + H₂O + sunlight → sugars + O₂

• CO₂ + O₂ + sunlight → sugars + H₂O

• H₂O + O₂ + sunlight → sugars + CO₂

• Sugars + O₂ → CO₂ + H₂O + sunlight

What process converts atmospheric carbon dioxide to dissolved bicarbonate?

• Marine photosynthesis

• Silicate-mineral weathering

• Fossil fuel burning

• Human emissions

Which geological event can balance carbon release by releasing carbon at a rate similar to other processes?

• Earthquakes

• Volcanic eruptions

• Tsunamis

• Landslides

What is the term used to describe the reflectivity of the Earth's surface, such as ice and snow?

• Albedo

• Permafrost

• Greenhouse effect

• Feedback mechanism

What is the expected effect of increased carbon dioxide in the atmosphere on forest canopies?

• It causes forest canopies to shrink.

• It causes forest canopies to grow.

• It has no effect on forest canopies.

• It causes forest canopies to die.

What percentage of CO2 has been added to the atmosphere since 1750?

• 20%

• 40%

• 50%

• 60%

What compound is formed when carbon dioxide is absorbed by the ocean?

• Sulfuric acid

• Hydrochloric acid

• Carbonic acid

• Nitric acid

How does ocean acidification affect marine organisms with calcium carbonate shells?

• It strengthens their shells

• It has no effect

• It thins their shells

• It makes their shells more colorful