Why is the ozone layer so important for our survival?
Correct answer: B. The ozone layer absorbs harmful ultraviolet radiation from the sun.
- A. It provides air resistance to objects entering Earth, causing them to burn up.
- B. The ozone layer absorbs harmful ultraviolet radiation from the sun.
- C. Ozone traps harmful chemicals like chlorine to prevent tissue damage.
- D. Ozone breaks down into oxygen which is essential for breathing.
Explanation
The stratospheric ozone layer is crucial because it acts as Earth's "sunscreen," absorbing the majority of the sun's harmful ultraviolet (UV) radiation. This protection is vital as excessive UV radiation can lead to skin cancer, cataracts, and other health issues, as well as harm ecosystems and wildlife. The other options are incorrect because they attribute roles to the ozone layer that belong to the broader atmosphere or misrepresent its chemical interactions.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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