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Clouds & Particles

Basics

3. Sun and clouds

Worksheet 1

Can you answer the following questions?

1) What is albedo?

a) percentage of light reflected by an object
b) a South-American sun dance
c) the rainbow
d) an African rain dance

2) The white sunlight contains...

a) all colors except red
b) all colors
c) no colors except red
d) no colors

3) An object appearing as red does actually...

a) reflect all colors
b) reflect all colors except red
c) absorb all colors
d) absorb all colors except red

4) An object appearing as black does actually...

a) reflect all colors except black
b) reflect all colors
c) absorb all colors except black
d) absorb all colors

5) Which of the following statements is correct?

a) the blacker an object is, the bigger is its albedo
b) the redder an object is, the bigger is its albedo
c) the whiter an object is, the bigger is its albedo
d) the smaller an object is, the bigger is its albedo

6) Which of the following statements is correct?

a) the less glossy the finish is, the bigger is its albedo
b) the glossier an object's finish is, the bigger is its albedo
c) the softer an object is, the bigger is its albedo
d) the warmer and object is, the bigger is its albedo

7) Thin cirrus clouds have low albedo because they are...

a) big
b) white
c) not transparent to sunlight
d) partly transparent to sunlight

8) Which of the following characteristics of a cloud would give the biggest albedo?

a) thick and high with many big droplets
b) thin and high with few big droplets
c) thick and low with many big droplets
d) thick and high with few big droplets

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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.