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6. The air has no colour, but the dust, water, smoke, pollen and other particles make it possible for us to see it. 5by DONOS

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12.  Meteorologists are people who work on weather prediction.  This prediction is usually called “weatherforecast”.  Weather prediction is often represented in a weather map. 11 by DONOS

13. People use different tools to predict weather; some of them are very familiar, like the thermometer (it measures temperature), the anemometer (it measures the speed of wind), the weathercock (measures the direction of the wind) or the barometer (it measures air pressure) thermometer barometer weathercock anemometer 12 by DONOS

14.  At present metheorologists working on weather stations get information with more complex tools, like weather satellites and doppler radars. by DONOS 13

15. What is the most abundant gas in the atmosphere?  A) oxygenoxygen  B) nitrogennitrogen  C) carbon dioxidecarbon dioxide 14 by DONOS

16. The layer of the atmosphere we live in is called…  A) stratospherestratosphere  B) mesospheremesosphere  C) tropospheretroposphere by DONOS 15

17. The ionosphere is made up by…  A) the troposphere and the stratosphere.the troposphere and the stratosphere.  B) the exosphere and the thermosphere.the exosphere and the thermosphere.  C) the mesosphere and the thermosphere.the mesosphere and the thermosphere. by DONOS 16

18. Carbon dioxide helps to …  A) keep the atmosphere warm.keep the atmosphere warm  B) produce rain.produce rain.  C) keep the atmosphere cold.keep the atmosphere cold. by DONOS 17

19. The “greenhouse effect” is caused by an excess of ….  A) pollution.pollution.  B) carbon dioxide.carbon dioxide.  C) humans breathing.humans breathing by DONOS 18

20. The condensation of water vapor produces…  A) clouds.clouds.  B) rain and snow.rain and snow.  C) rain.rain. by DONOS 19

21. A weather prediction is also called…  A) weather station.weather station.  B) weather satellite.weather satellite.  C) weather forecast.weather forecast. by DONOS 20

22. The following tool is a …  A) weathercock.weathercock.  B) an anemometer.an anemometer.  C) a barometer.a barometer. by DONOS 21

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