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Clouds & Particles

Basics

2. Particles

Worksheet 1

Can you answer the following questions?

1) Aerosols are...

a) small particles in the atmosphere
b) small particles in the sea water
c) a gaseous substance in the sea water
d) small water droplets in the atmosphere

2) Aerosols originate from...

a) human activity merely
b) both human activity and natural processes
c) natural processes merely
d) They have always been there, and are not formed and destroyed

3) Which of the following natural sources of aerosols is not important?

a) oceans
b) the ground
c) volcanoes
d) space

4) The source of anthropogenic aerosols is

a) severe storms
b) deserts
c) all living organisms
d) humans

5) One of the following sources of anthropogenic aerosols is not significant. Which?

a) industry
b) residential heating
c) household dirt
d) vehicles

6) The aerosol concentrations in the air is highest...

a) above sea areas
b)above urban areas
c) above rural land areas
d) The air is well mixed, so the concentration is approximately the same everywhere

7) For all areas the concentration of...

a) aerosols are approximately the same for all aeroslo sizes
b) small aerosols is approximately the same as of the coarse
c) coarse aerosols is higher than of the small
d) small aerosols is higher than of the coarse

8) Which of the following is not a transformation mechanism for aerosols

a) radiation
b) coagulation
c) condensation
d) cloud processing

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Authors: Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norway. Scientific reviewer: Justine Gourdeau - LaMP Clermont ferrand - France - 2004-01-13. Quiz programmer: Julia Heres - University of Nürnberg - Germany. Last update: 2004-03-27.