Environmental Science Climate Change and Atmosphere

Question 1

Which layer of the atmosphere contains the ozone layer that protects Earth from UV radiation?

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 2

What is the global warming potential (GWP) of methane compared to CO₂ over a 100-year timeframe?

Accepted Answer

About 28–36 times greater

Answer

About 5 times greater

Answer

About equal

Answer

About 300 times greater

Question 3

Which international agreement, adopted in 2015, aims to limit global temperature rise to 1.5–2°C above pre-industrial levels?

Accepted Answer

Paris Agreement

Answer

Kyoto Protocol

Answer

Montreal Protocol

Answer

Rio Declaration

Question 4

Rising sea levels due to climate change are primarily caused by two processes. What are they?

Accepted Answer

Thermal expansion of seawater and melting land ice

Answer

More rainfall and dam construction

Answer

Ocean acidification and increased evaporation

Answer

El Niño events and tidal changes

Question 5

Which feedback mechanism amplifies warming by reducing Earth's reflectivity as polar ice melts?

Accepted Answer

Ice-albedo feedback

Answer

Carbon cycle feedback

Answer

Water vapor feedback

Answer

Planck feedback

Question 6

What is the Keeling Curve?

Accepted Answer

A continuous record of atmospheric CO₂ concentration at Mauna Loa

Answer

A graph of global temperature anomalies since 1850

Answer

A plot of Arctic sea ice extent over time

Answer

A map of ocean acidity changes