1Learning objective
6.4.1—Solar radiation spectrum
New• Low frequency radio to high frequency gamma
• Infrared, visible light, ultraviolet (UV)
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Start with the concept explanation, then practise to create mastery evidence.
2Learning objective
6.4.2—UV radiation danger
New• Shorter wavelengths, higher frequencies, more energy
• UVA, UVB, UVC damage organisms
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3Learning objective
6.4.3—Stratospheric ozone protection
New• Absorbs UV radiation from Sun
• Protects living organisms from harmful effects
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Start with the concept explanation, then practise to create mastery evidence.
4Learning objective
6.4.4—UV radiation impacts
New• Reduces photosynthesis in phytoplankton
• DNA damage: mutations, cancer
• Humans: sunburn, premature ageing, cataracts
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Start with the concept explanation, then practise to create mastery evidence.
5Learning objective
6.4.5—Ozone equilibrium
New• Steady state between formation and destruction
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6Learning objective
6.4.6—Ozone-depleting substances (ODSs)
New• Destroy ozone molecules
• Augment natural breakdown
• Not a cause of global warming
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7Learning objective
6.4.7—Ozone depletion effects
New• More UVB reaches Earth's surface
• Polar "ozone holes" in spring
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8Learning objective
6.4.8—Montreal Protocol
New• International treaty regulating CFCs and ODSs
• Most successful international environmental cooperation
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9Learning objective
6.4.9—Montreal Protocol success
New• Prevented planetary boundary crossing
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