 - 1. In which layer is the ozone?
A) Mesosphere B) Stratosphere C) Biosphere D) Troposphere
 - 2. In which layer does reach a temperature of -60ºC?
A) Litosphere B) Stratosphere C) Troposphere D) Exosphere
 - 3. In which layer is the pressure lower?
A) Troposphere B) Stratosphere C) Thermosphere D) Biosphere
 - 4. The main gases which form the atmosphere are..
A) N2 , O2 B) He , O2 C) He , N2 D) H2 , O2
 - 5. In the thermosphere the temperature drop
A) FALSE B) TRUE
 - 6. The troposphere layer reach until
A) 50 km B) 500 km C) 80 km D) 12 km
 - 7. The atmospheric phenomena occur in
A) Exosphere B) Stratosphere C) Biosphere D) Troposphere
 - 8. The IONOSPHERE is important because
A) Reflect the Electromagnetic Waves B) Reduces the greenhouse effect C) Absorbe the UVA rays D) Keeps the temperature stable
 - 9. What's the name of the instrument used to measure atmospheric pressure
A) Presionómetro B) Atmosferómetro C) Manómetro D) Barómetro
 - 10. El calentamiento de la atmosfera debido a la absorcion de ondas infrarojas por el CO2 se denomina
A) Greenhouse effect B) Water Cycle C) Greenwich effect D) Photosynthesis
 - 11. In which layer of the atmosphere meteors are burned
A) Mesosphere B) Stratosphere C) Troposphere D) Thermosphere
 - 12. The greenhouse effect is
A) Warming of the atmosphere B) Droping of acid rain C) Growth of green plants D) Increase of UVA radiation
 - 13. The instrument used to measure the pressure of a gas in a container is called
A) Presionómetro B) Manómetro C) Gasómetro D) Barómetro
 - 14. CO2 absorption by plants to produce food is called
A) Photosynthesis B) CO2 cycle C) Greenhouse effect D) Oxidation
 - 15. on top of Mount Everest the atmospheric pressure is about
A) 1/6 of the pressure at sea level B) 1/2 of the pressure at sea level C) 3 times the pressure at sea level D) 1/3 of the pressure at sea level
 - 16. Atmospheric pressure is the same at any height from the ground
A) False B) True
 - 17. The average temperature on the surface of the earth is about
A) -18ºC B) 0ºC C) 15ºC D) 25ºC
 - 18. the first scientist who measured the atmospheric pressure was
A) Galileo B) Arquimedes C) Newton D) Torricelli
 - 19. oxygen from the atmosphere
A) was produced by amphibians B) was produced by anaerobic bacteria C) was produced by fungi D) was produced by green plants
 - 20. which gas was NOT present in the PRIMITIVE earth's atmosphere?
A) O2 B) SO2 C) NH3 D) H2O
 - 21. The force exerted at sea level by atmospheric pressure is about
A) 9'8 kg / cm2 B) 1 kg / m2 C) 1 kg / cm2 D) 760 g / m2
 - 22. The most abundant gas in the atmosphere in our days is
A) Carbon dioxide B) water vapor C) Oxygen D) Nitrogen
 - 23. CO2 is a gas useless. It only serves to increase the greenhouse effect
A) True B) False
- 24. Razona por qué la presión atmosférica DISMINUYE con la altitud (por ej. a la altura a la que vuelan los aviones -10.000 m- es casi 4 veces menor)
- 25. Haz una breve redacción contando lo que has aprendido en esta unidad y destacando lo que te ha parecido mas interesante.
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