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Clouds & Particles

Basics

3. Sun and clouds

Worksheet 2

Can you answer the following questions?

1) Which of the following clouds would give the biggest albedo?

a) cumulus
b) cirrus
c) cumulonimbus
d) stratus

2) The average albedo of our planet is...

a) 5 %
b) 30 %
c) 70 %
d) 99 %

3) Compared to an unclouded sky, earth under an overcast sky will be...

a) warmer at day and warmer at night
b) colder at day and warmer at night
c) warmer at day and colder at night
d) colder at day and colder at night

4) Clouds' capacity to absorb infrared radiation affect climate on earth by influencing the...

a) temperature
b) way we se objects with red color
c) acid rain
d) rainbow

5) Which of the following processes is not likely to happen if climate gets warmer?

a) formation of more clouds
b) warming because clouds will trap more heat (infrared radiation) from ground
c) formation of less clouds
d) cooling because clouds will reflect more sunlight back to space

6) You can only see the rainbow when the sun is...

a) right above you
b) beside you
c) in front of you
d) behind you

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1. Experiment: Absorption and transmission

Place a thick glass slab (or a stack of glass slabs) on the overhead projector and watch the light square projected on the wall.

What do you see where the glass slabs are?

Touch the glass slabs. What do you feel?

Explain your observations in terms of transmission and absorption.

2. Windows' reflection and transmission

When you sit inside in a lighted room and look at the window when it is dusk outside, you will see the outside environment (the garden, street or whatever) and at the same time you will see an image of yourself and the room.

Explain this in terms of transmission and reflection.

Photo: Microsoft clipart

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.