Hover or tap underlined Spanish terms to see their translation and exam tip.
Acerca de la atmósfera, señale la opción verdadera.Concerning the composition of the atmosphere, mark the true option:
Show the answer
Correct answer: b) It is a mixture of gases that also carries solid or liquid particles in suspension.
Why it is correct
The Earth’s atmosphere is a mixture of gases (dry air plus a variable share of water vapour) that also holds suspended aerosols: solid particles (dust, salt, smoke) and liquid droplets.
Why the others are not
- a) The water-vapour content varies widely (0% to 4%).
- c) Water vapour is central to heat transfer and weather.
- d) The percentages are swapped: 78% is nitrogen and 21% oxygen.
How to work it out in the exam
- Atmosphere = mixture of gases + suspended solid and liquid particles.
Where this question comes from
- Junta de Andalucía · 2022 · 2ª convocatoria · CY Módulo genérico · question 1 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.