IB ESS TOPIC 6 QUESTIONS AND ANSWERS WITH VERIFIED SOLUTIONS 100% CORRECT RATED A+ NEWLY UPDATED 2025

lOMoARcPSD| 54339004




IB ESS TOPIC 6 QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTIONS 100% CORRECT
RATED A+ NEWLY UPDATED 2025
🌍 Atmosphere & Related Concepts
Atmosphere
✔✔ A dynamic system with inputs, outputs, flows, and storages that supports life; its
composition and structure have changed over geological time.
Albedo
✔✔ A measure of reflectivity (0 = absorbs all light, 1 = reflects all light).
 Low albedo: dark soils (~0.08)
 High albedo: fresh snow (~0.9)


🌡️ Greenhouse Effect
Greenhouse Effect (Natural)
✔✔ Essential for life, retains Earth's heat by trapping infrared radiation in the atmosphere.

🛡️ Ozone Layers
Stratospheric Ozone (Good)
✔✔ Located ~25–30 km above Earth in the stratosphere
✔✔ Shields the Earth from harmful UV rays
✘ Depleted by CFCs (from refrigerants, aerosols, solvents)
✘ Impacts:
 UV radiation increase
 Skin cancer & cataracts
 Damaged marine ecosystems & biodiversity loss
 Reduced photosynthesis
Ozone Formation
✔ Created naturally when O₂ molecules react with UV radiation.
Tropospheric Ozone (Bad)
✔✔ Found in the troposphere (the air we breathe)
✔✔ A pollutant formed by reactions between nitrogen oxides and hydrocarbons from fossil
fuels under sunlight
✘ Impacts:
 Respiratory issues
 Eye irritation
 Reduced crop yields
 Reduced photosynthesis