Chapter 2.6

What is albedo?

• The heat energy absorbed by oceans

• The proportion of solar radiation reflected by Earth's surface

• The process of storing carbon in ecosystems

• A measure of greenhouse gas emissions

Which land cover change increases albedo the most?

• Urbanization

• Afforestation

• Peatland drainage

• Deforestation

Which of the following is a positive feedback loop?

• Rock weathering

• Ice-albedo feedback

• Afforestation

• Planck radiation feedback

How does urbanization affect albedo?

• Increases albedo

• Decreases albedo

• Has no impact on albedo

• Increases carbon sequestration

What is the role of forests in carbon sequestration?

• Reduce atmospheric methane

• Absorb CO₂ through photosynthesis

• Increase albedo

• Emit CO₂ into the atmosphere

What happens when permafrost thaws?

• More CO₂ and methane are released

• Albedo increases

• Global temperatures decrease

• More water vapour is absorbed

Which gas is released when peatlands are drained?

• Oxygen

• Methane

• Nitrogen

• Ozone

Which of the following contributes to the urban heat island effect?

• More wetlands

• Increased tree cover

• Increased concrete and asphalt

• Increased reflective surfaces

Which process removes CO₂ from the atmosphere over long time scales?

• Urbanization

• Desertification

• Deforestation

• Chemical weathering

What effect does deforestation have on the climate?

• Reduces methane emissions

• Increases CO₂ levels

• Decreases atmospheric temperatures

• Increases rock weathering